Thursday, November 22, 2018

New innovation in gauging system for Indian Navy & Coast Guards





The whole exhibit of tasks in which a nation's maritime powers might be concerned is colossal, extending from extraordinary war battling to beneficent and disaster help activities. This expansive scope of activities can be partitioned into independent jobs, each requesting an exact way to deal with the conduct of tasks. 

The hardware utilized by them for different focuses additionally extend from exceedingly escalated to direct, from complex to simple and exceptional. 

Indian Navy and Coast Guards make utilization of fuel freight ships, which are self-pushed and capable of recharging different fuel oils to seaward watch vessels in harbor, at safe haven and various fuel terminals at remote areas. 

The dimension checks, switches and transmitters utilized by Indian Navy are very adjusted and careful. The measuring framework must be advanced for checking number of fuel tanks and crisp water tanks on their freight boats. 

Techtrol made and conveyed tank checking framework for their fuel flatboats with extraordinary striking highlights alongside IRS accreditation. We planned and created checking framework in accordance with their stringent determinations, which comprised of customized hydrostatic transmitters to be introduced on assigned tanks alongside unified HMI board to be situated in wheel house and two remote HMI boards at fundamental deck and siphon house. The transmitters for fuel tanks were given zener obstructions for natural wellbeing.

Wednesday, November 21, 2018

Key factors to consider before measuring level of liquids





Pune Techtrol Pvt. Ltd. has evolved from a six employee enterprise, in 1984 to become a premier Indian company recognized for quality level measurement and process automation systems for liquids & solids. We are an ISO 9001 2015 Company located in the Industrial belt of Pune, around 180 kms from Mumbai, the commercial capital of India. Pune is famous globally for quality instrumentation industries with ample skilled & talented work force. ‘Techtrol’ is recognized as most reliable & trusted brand, delivering quality products unsurpassed in terms of accuracy, workmanship, performance, safety & ease of installation, providing long uninterrupted service in wide & varied industrial applications. Our products are designed & engineered for optimal performance and with practical experience gained over last several years has equipped us, to meet the most demanding user requirements.

Complex automated systems are in-demand. The requirement for ever-more-stringent process control, and an inexorably strict condition of regulating the process, drive the engineers to seek more precise level measurement & control systems forliquids. Enhanced accuracy of level measurement makes it conceivable to decrease complex process fluctuation, bringing about high-quality results, lesscosts, and much lesser waste. ids–heavy or light-weight, there are certain characteristics that need to be considered. Though liquids have more predictable characteristics than solids, the damage caused by the improper selection of instruments can be of the same intensity.

In this article, we shall discuss some key factors that you should take into consideration before you decide measuring levels in liquids.

  • Types of level measurement /monitoring
  • Nature of liquid
  • Condition of liquid
  • Properties of liquid
  • Operating conditions
  • Area classification
  • Sterile/Aseptic process
If all of the aforementioned six factors are considered for level measurements in liquids, then you are good to go out to choose the proficient equipment that can cater to your requirements in diverse processes.
Contact Us

Pune Techtrol Pvt.Ltd

S-18, MIDC Bhosari,

Pune - 411026,India

Phone No- 020 66342900


Tuesday, November 20, 2018

Five Key Factors for Measuring Solids Level

Measuring the level of solids and powders of bulk volume in any vessel can be comparatively a bit challenging than that of liquids. Level of solids is unpredictable as they accumulate in uneven shapes in storage silos and hence difficult to measure.
In this article, we shall discuss some key factors that you should take into consideration before you decide measuring level of solids.

Types of level measurement /monitoring
The process application decides the type of instrument required and its function. There are two types of major level measurement or monitoring gears that can be used to measure levels in solids depending on the kind process applied in the industry:
The detection and control of the level can be very well be achieved with the help of different types of switches. . Switches are versatile, reliable, and robust in their function. The easy-to-install switches come in various sizes and make.
Transmitters on the other hand are useful for the continuous monitoring of the level in the silos. The process application and functional requirement you choose, decide the type of instrument required. There are range of transmitters that offer high temperature and pressure operations suitable for remote programming as well.
Nature of solids
Identifying the nature of solids is crucial as it will help in selecting the appropriate type of equipment for measuring the level. The nature of solids can be either free-flowing or they can be hygroscopic. The shifting nature of uneven surfaces in solids makes it difficult to make assumptions. The surface levels of solids, unlike liquids, are not the same throughout the vessel.
Free-flowing solids such as cement, limestone, and other powders need conducive measuring equipment.
Hygroscopic solids are prone to absorbing moisture and lump formation. Hence, opting for a suitable instrument to measure their level is also vital.
Properties of solid
Another factor to look for while choosing the equipment for measuring the levels in solids is studying the physical properties of the solid. Examine the particle size, bulk density as well as the dielectric constant of the solid.
Particle Size: This can range from fine powder to coarse materials. The space between the particles determine the extent of lump formation.
Bulk Density (BD) and Dielectric Constant (DC): Many solids have low BD and DC values. These factors to be looked out for, if you opt for level measurement with the radar technology.
Knowing the properties of the solids will assist in selection of appropriate instrument which would perform with the required accuracy and precision. If the equipment zeroed down is a perfect fit, then you can avoid breakdowns or errors in the results.
Contact Us
Pune Techtrol Pvt.Ltd
S-18, MIDC Bhosari,
Pune - 411026,India
Phone No- 020 66342900
Email Id- ho@punetechtrol.com




Friday, November 16, 2018

Preventing Overfilling with the help of Level Measurement Control

Overfill hindrance are often accomplished by using Techtrol Level Measurement instruments to manage body of water flow into the tanks once the fabric level has reached high level. Pune Techtrol offers cost-efficient, simple to put in & maintenance free instruments which give long sturdiness and are available with wide alternative of materials to suit varied services.

Overfill of any instrumentality could be a potential hazard! Crude oil tanks, solvent farm tanks, LPG tanks, underground tanks, or perhaps flowing solid crammed silos do have an occasion of overfilling associate outflow of hold on material. Hence, they have to be monitored & controlled to stop fill and also the later loss. Besides, if the medium in question is ignitable, it will cause severe damages to physical assets, setting and folks. Interference of such an occasion is often achieved through fill management together with savings in cleanup price and period.
The quiddity of safe-handling fluid contents–both venturous and inflammable–lies within the use of the proper reasonably level gauge. That will forestall from the tank to fill, that successively will keep everybody around safe and sound! Technology has evolved with time. Safety measures obtaining progressively necessary and rigorous, the industries ought to keep themselves au courant progressive gauging systems.
Techtrol Level Measurement put in on tank at high-level planned purpose, to sight presence of fabric and actuates auxiliary device to prevent body of water flow.
Level transmitters square measure put in on tank to supply continuous level indication of fabric within the tank from bottom to prime through a generated signal of 4-20mA at planned level. At planned level, an indication is transmitted to actuate auxiliary device and stop body of water flow.
Float radio-controlled Switch could be a prime mounted switch supported physicist principle of floating body. The float actuates a switch magnetically at a planned level purpose of liquids. It’s offered for single or multiple shifts up to four levels.
Techtrol Bilge Switch could be a miniature float switch mounted within a perforated cage to stop suspended particles from impeding the float movement in liquids. it's supplied with associate extension cable of needed length to sight corresponding planned level in bilge tanks on ships. it's federal agency category approved for marine applications and appropriate for single shift.
Float Pivoted Switch could be a aspect mounted switch for single shift, supported physicist principle of floating body in liquids. The float magnetically actuates a switch at planned level.
To Read More Visit:   Prevent Overfilling


Wednesday, November 14, 2018

Waste Water Management Treatment in Pune Techtrol

Pune Techtrol is manufacturer and provider of level activity and management instruments customize its product such they serve  waste water management.

Campaigns for water preservation and saving water area unit running all across the planet. folks area unit being urged to require precautional measures whereas exploitation water. Is there very a desire to create such trouble around a standard issue referred to like water? the solution is a visible affirmative, the explanation that stands the same as our previous blogs on waste water management.
Pune Techtrol Pvt. Ltd. believes in creating a distinction whereas running a corporation. The in-house motivation for constant may be seen once adult male. Ramesh Pabalkar, the final Manager at Pune Techtrol Pvt. Ltd. says, “The ‘water crisis’ can hit U.S. abundant before the‘energy crisis’. each chance for saving water and use treated waste water should be explored.”
The level transmitters by Pune Techtrol area unit instruments that prove terribly helpful within the method of waste water management. The Techtrol supersonic Transmitter (TUS) could be a non-contact sort level transmitter, typically used for an activity of flow in open channel or level observance in tanks. it's compact, non-contact, and straightforward to put in, integral sort transmitter for a continuous level activity of non-corrosive liquids and slurries. it's programmable through Keys.
Owing to its aforesaid characteristics, it proves extremely helpful in waste water management plants. it's used for numerous processes in storage tanks, filter beds, flotation cells, water/waste water/effluent treatment (WTP, ETP), etc.
For any data on level measuring and management instruments, contact our specialists on 20-66342900 or mail us at ho@punetechtrol.com


Monday, November 12, 2018

Water Management Systems Loss Measurement

With man’s increasing have to be compelled to consume water, have to be compelled to live water in Open Channels has additionally accrued. Open Channels area unit those natural and artificial structures through that water flows with a free surface. For Open Channels variety of various and varied strategies are developed to live the flow of water. fashionable mechanical and electronic flow meters have created the continual measure of open channel flows attainable.
Pune Techtrol offers solutions for measurement “Loss of Head” (differential level) between upstream and downstream of the filter screen in open channels of WTP’s / ETP’s, filtration stations, water management systems, etc.
Techtrol’s supersonic loss of head level system – LHUS is wide utilized in water canals, water treatment plants, biodegradable pollution pumping and filter stations. It consists of a combine of supersonic transmitters and a differential level controller. The transmitters area unit put in on either facet of the filter screen to translate the amount grow to be Associate in Nursing analog signal by victimisation time of flight principle. The relative distinction between the 2 signals from upstream and downstream is processed by the analysis unit and displayed as “Loss-of-Head” digitally.
System Operation
The system of 2 supersonic Transmitters (Ultratrol), that encompass supersonic electrical device integral with microcontroller primarily based physical science housed in Associate in Nursing enclosure. Supersonic pulses emitted from the electrical device to the target area unit mirrored back and detected by the physical science to produce 4-20mA current output. the 2 supersonic Transmitters area unit mounted on the upstream Associate in Nursingd downstream facet of the bar screen placed in an open channel. These transmitters area unit connected to Differential Level Controller (TDLC) with relay set at a predefined worth. the amount distinction between upstream and downstream facet is measured by the TDLC to actuate a predetermined relay.
TDLC can even be given 4-20mA (re- transmission) to DCS / PLC Screen Panel for more management and automation.

To Read more articles visit: Manufacturing Level Controls

Sunday, November 11, 2018

Magnetic Level Gauges: Securing Pharmaceutical Manufacturing

In the Pharmaceutical industry, most problems that were encountered in tubular glass gauges for level measurements are now resolved by magnetic level gauges. Tubular glass gauges are placed parallel to the vessel at a suitable height and are mounted with fittings, which enables to maintain the pressure and seal at both ends of the tube. But, it has been noticed that this type of installation is unsuitable for certain liquids. There is a possibility that the glass tube would be fractured or one or both seals would suffer from leaks. Consequently, the liquid could escape outside the gauge. For this reason, in case of critical liquids in the Pharmaceutical industry, the design of tubular level gauges is found unsatisfactory.

In course of time, magnetic level gauges have replaced tubular level gauges as in case of magnetic level gauges, there are practically no probable leak points. The main advantage of Pune Techtrol’s magnetic level gauge is its “all metallic” construction. Level indicating part of the gauge does not come in contact with the liquid. There is no presence of fragile glass tubes, which can break and cause safety hazard. The visibility of the level readings is vastly improved. The instances of maintenance are very less. The initial installation is simpler as compared with other gauges. Without interruption in the level measurement process, addition of switches and transmitters can be performed. Because the addition of switches and transmitters is possible, technique of dual redundancy has led to improved security. The Return on Investment (RoI) benefits are more.
Additionally, Techtrol’s magnetic liquid gauges are superior to the tubular glass gauges due to the various factors mentioned below.
Long-distance visibility
Tubular glass level gauge indicators enable the personnel to take readings of level from a maximum distance of three metres. In case of Techtrol’s magnetic type level gauge, it is possible to note the level reading from a distance of 10 metres or even somewhat more. This is possible due to a fluorescent and bright contrasting colours of the flag. More sophisticated visual indicators also allow viewability up to 30 metres.
Lesser maintenance costs
In case of sight gauge level indicators, it is mandatory to clean them on a periodic basis and check for leaks. The process liquids can cause build-up, etching and scaling on the glass due to which the sight glass can become unreadable. The advantage of magnetic level gauges of Pune Techtrol is that they are almost free of maintenance because there is no contact between the process liquid and the indicator.
Lesser risks
The chemical compatibility of a liquid needs to be ensured only in case of the float, gaskets and the metallic chamber. On the other hand, in tubular glass level gauge the liquid must be chemically be compatible with all the materials that get wet, such as the gaskets, sealants, metal and glass.
The possibility of rupture of a magnetic level gauge is not there at all due its “all metallic” construction. The float chamber of the magnetic level gauge is made up of the same metal as that of the main vessel. In the tubular glass level gauges, extreme temperature or pressure can lead to a fracture. So, the magnetic level gauge and the surrounding piping are equally secure. The mounting of the switches, transmitters and indicators is external. So, they are not affected by corrosiveness, toxicity or other harmful effects of the liquid.
Other salient features
Pune Techtrol manufactures magnetic liquid level gauges that can accommodate in parallel, micro-switches and adjustable bistable alarm contacts with reed switches. The design of the magnetic float system allows for 360 degrees magnetic coupling. These gauges can be fitted with radar transmitters. Indication of a float failure is also possible. The indicator housing is typically made of Aluminium. These gauges are hermetically sealed and filled with inert gases. When installation is required within a limited space, magnetic level gauges are optimally suited. For the float and the guided wave radar to work independently, the chamber can be fitted with special baffle plate. A different range of materials is used for the construction. Easy mounting is possible with a flanged connection. No power supply is essential for level indication. Overall, this is an economical measurement solution.
Tests recommended for magnetic level gauges
Techtrol’s gauges are subjected to a large number of tests to ensure reliable and precise level measurement. They are verified for the Seismic test, Radiography on butt weld joints, Ultrasonic test on butt weld joints, Vacuum test, PMI test, Dye penetrant test, Helium leak test, Pneumatic test and Hydrostatic test.
It can now be easily understood that a magnetic level gauge is a very suitable choice when there is  need of visibility from a long distance, minimization of maintenance, lessening of fugitive emissions or media leakage or personnel safety.
Pune Techtrol caters to the various needs of level measurement in the Pharmaceutical industry. It manufactures excellent-quality magnetic level gauges, which have a huge demand in this industry. These gauges are designed keeping in mind the specific needs of this industry. Techtrol’s magnetic type level gauges are reputed to serve a wide range of customers in the Pharmaceutical domain.
About Us                                                                                    
Pune Techtrol Pvt. Ltd. has evolved from a six employee enterprise, in 1984 to become a premier Indian company recognized for quality level measurement and process automation systems for liquids & solids. We are an ISO 9001 2008 Company located in the Industrial belt of Pune, around 180 kms from Mumbai, the commercial capital of India. Pune is famous globally for quality instrumentation industries with ample skilled & talented work force. ‘Techtrol’ is recognized as most reliable & trusted brand, delivering quality products unsurpassed in terms of accuracy, workmanship, performance, safety & ease of installation, providing long uninterrupted service in wide & varied industrial applications. Our products are designed & engineered for optimal performance and with practical experience gained over last several years has equipped us, to meet the most demanding user requirements.
Our technical support to customer starts from the enquiry stage, through proper selection & guidance, right up to supervision of installation & calibration at site. This is accomplished through large network of experienced representatives & distributors backed by our team of enterprising sales & service engineers.
Our people are our strength and as such our prime philosophy is to respect them as individuals with inherent skills, to be channelized to create value for our society & country. We believe that, our reputation and our product quality & services are a result of their team work and as such, it has been our endeavour to train them continuously for higher multi-skills and better understanding of our products & customer expectations of us.
Contact Us
Pune Techtrol Pvt.Ltd
S-18, MIDC Bhosari,
Pune - 411026,India
Phone No- 020 66342900
Email Id- ho@punetechtrol.com

Friday, November 9, 2018

A journey of thousand miles begins with a single step at Pune Techtrol

Pune Techtrol, established in 1984, evolved from a six-employee venture, is now recognized as the globally leading manufacturer of the level measurement and control instruments for liquids and solids. It all started with a dream that Mr Nandlal P. Khatan had for his company, which has come true as a result of the great determination and dedication of these many years. We, at Pune Techtrol Pvt. Ltd., have always aimed to achieve the best and strive for the better, inspiring a series of success stories to the name of Pune Techtrol.

The company has come a long way overcoming all the odds and has achieved a significant name in the level measuring instruments and process automation systems. It has only been possible because of the consistent efforts and hard work invested by all the employees, for the growth of the company. Our main strengths are innovation, continuous quality improvement, and employee-driven growth. We have been expanding our horizon and reaching out to OEMs, manufacturers, large industries, MNCs, project consultants and semi-government and government sectors.
Our focus has been on providing the finest products to our customers globally. Our products have multifold applications in process automation. The qualities of instrumentation we provide are the outcome of up-to-date knowledge, skilled workmanship, and dedication of our team. Our mission is to continually meet future challenges of an evolving process industry, through the incorporation of new technology, human resources & skills.
Mr Nandlal Khatan, Managing Director, Pune Techtrol Pvt. Ltd. expressed his feelings by saying …
“I have great confidence in my people and their integrity and innovative thinking. It would not have been possible without their hard work and collective effort that they put for the good of the company. I am grateful for their dedication towards the company.”
It was a proud moment for us to have received an opportunity to serve to our Indian Navy. Supplying our products to the Indian Navy has been one of the privileged opportunities to serve the country. Our instruments qualified all the critical quality tests prescribed by Indian Navy and have received repeated orders time and again. With this, we have added another chapter to its ongoing story of success in level measuring instruments. Be it working with Multinational Corporations or Defense Establishments, we take pride in our accomplishments.
With our mission to provide best of products to our customers, we have always sought feedback from our customers and tried to meet their needs by customizing the products wherever possible. Their appreciations have boosted our confidence and helped us evolve stronger than before to deliver the best. Our motto is to Measure the Best for our clients.
Sudhakar Badiger, Manager, Sales, Pune Techtrol Pvt. Ltd. shared his views saying…
“I thankfully appreciate that our customers have recognized the product quality and services of Pune Techtrol. We believe that the feedback from our clients could actually prove constructive and help us improve and grow.”
Pune Techtrol Pvt. Ltd. has experience in international marketing and providing expertise in process automation. We continually upgrade our services and operations to meet the evolving needs of dynamic manufacturing industries. We, at Pune Techtrol, feel that the success is a journey, and not a destination. We are fortunate enough to come a long way. We feel a responsibility towards our society as well. We wish to contribute for the ‘Make in India’ project and in the growth of this nation.
About Us                                                                                    
Pune Techtrol Pvt. Ltd. has evolved from a six employee enterprise, in 1984 to become a premier Indian company recognized for quality level measurement and process automation systems for liquids & solids. We are an ISO 9001 2008 Company located in the Industrial belt of Pune, around 180 kms from Mumbai, the commercial capital of India. Pune is famous globally for quality instrumentation industries with ample skilled & talented work force. ‘Techtrol’ is recognized as most reliable & trusted brand, delivering quality products unsurpassed in terms of accuracy, workmanship, performance, safety & ease of installation, providing long uninterrupted service in wide & varied industrial applications. Our products are designed & engineered for optimal performance and with practical experience gained over last several years has equipped us, to meet the most demanding user requirements.
Our technical support to customer starts from the enquiry stage, through proper selection & guidance, right up to supervision of installation & calibration at site. This is accomplished through large network of experienced representatives & distributors backed by our team of enterprising sales & service engineers.
Our people are our strength and as such our prime philosophy is to respect them as individuals with inherent skills, to be channelized to create value for our society & country. We believe that, our reputation and our product quality & services are a result of their team work and as such, it has been our endeavour to train them continuously for higher multi-skills and better understanding of our products & customer expectations of us.
Contact Us
Pune Techtrol Pvt.Ltd
S-18, MIDC Bhosari,
Pune - 411026,India
Phone No- 020 66342900
Email Id- ho@punetechtrol.com


Friday, November 2, 2018

Steam: Major Source for heating and electricity generation

The utility of steam is multifold and can be put to use in a variety of industries for multiple purposes. Steam is a secondary source of energy since it is produced from water by combustion of any type of primary source of fuel in a boiler. Steam is produced out of a single process of energy conversion; it is a cheap source of energy.

Following characteristics of steam make it an ideal medium for heat transfer applications:
  • Efficient and economical to generate
  • Uniform heating - easy to distribute
  • Easy to control
  • Easily transferred to the process by its own pressure
  • Steam plant easy to maintain
  • Heat transfer takes place at constant temperature
The applications for steam are heating processes in plants and steam driven turbines in electric power plants, used by the massive petrochemical complexes to the local microbrewery, steam is an integral part of these processes.
Steam is one of the most versatile utility in the industrial energy arena today. In addition to simple heating applications, it can also be deployed in various industrial processes like cleaning, sterilization, drying, concentration, separation and evaporation.
  • In culinary applications, it preserves flavours, textures, and retains nutrients. For processing of vegetables and food, steam is used for sterilization and drying under vacuum.
  • The use of steam in the industry for the purpose of cleaning does not harm surfaces, motors, bearing seals, sensors and machinery equipment. Hence the requirement of mask off or cover equipment prior to cleaning is not there. There is very less chance of any cross-contamination and thus it helps in faster clean up.
  • The freshwater, naturally available from various sources, requires varying degrees of treatment before being fed to the boiler. Treatment of boiler feed water prevents the formation of scales and deposits, removes dissolved gases, protects against corrosion, eliminates water & steam carry-over, optimizes boiler efficiency and minimizes maintenance costs. Improper or nonexistent feed water treatment is the major cause of boiler failure.
  • In biotechnology applications, steam is produced in various grades of purity. Steam ranges in purity from boiler grade for routine tasks, to culinary grade “Clean Steam” for food and dairy, and goes up to super pure, pyrogen-free steam for biopharmaceutical and intravenous use.
  • In case of “dry saturated steam” there is a definite relationship between temperature and pressure of the steam. This characteristic of steam helps in controlling the processes precisely.
  • In the frigid oil & gas fields, steam is used for heat tracing of tanks and pipelines to keep processes moving.
Steam is a safe, flexible, economical, aseptic, and environment-friendly. Steam can be generated through combustion of fossil fuels, biomass or biogas. In the thermal power stations, steam is required to be produced in huge quantity for generation of electricity. The steam has to be produced at very high pressure (>150 kg/cm2) and high temperature (> 5400C), to produce steam in abundance, large volumes of feed water are supplied to the boiler. Although feed water cycle of a thermal power plant is a closed loop process, there is always some loss of water while it moves through the closed cycle. This loss of water has to be made up by addition of treated water into the feed water tank via de-aerator. Feed water contains dissolved oxygen, which can cause corrosion in the boiler tubes. Hence the dissolved oxygen must be removed from the feed water. This process is carried out in the de-aerator with the help of steam. De-oxygenated and heated feed water enters the boiler by means of feed water pump, where it is further treated with chemicals.
About Us                                                                                    
Pune Techtrol Pvt. Ltd. has evolved from a six employee enterprise, in 1984 to become a premier Indian company recognized for quality level measurement and process automation systems for liquids & solids. We are an ISO 9001 2008 Company located in the Industrial belt of Pune, around 180 kms from Mumbai, the commercial capital of India. Pune is famous globally for quality instrumentation industries with ample skilled & talented work force. ‘Techtrol’ is recognized as most reliable & trusted brand, delivering quality products unsurpassed in terms of accuracy, workmanship, performance, safety & ease of installation, providing long uninterrupted service in wide & varied industrial applications. Our products are designed & engineered for optimal performance and with practical experience gained over last several years has equipped us, to meet the most demanding user requirements.
Our technical support to customer starts from the enquiry stage, through proper selection & guidance, right up to supervision of installation & calibration at site. This is accomplished through large network of experienced representatives & distributors backed by our team of enterprising sales & service engineers.
Our people are our strength and as such our prime philosophy is to respect them as individuals with inherent skills, to be channelized to create value for our society & country. We believe that, our reputation and our product quality & services are a result of their team work and as such, it has been our endeavour to train them continuously for higher multi-skills and better understanding of our products & customer expectations of us.
Contact Us
Pune Techtrol Pvt.Ltd
S-18, MIDC Bhosari,
Pune - 411026,India
Phone No- 020 66342900
Email Id- ho@punetechtrol.com