Differential Scale Loop DSL

Investigation of salt deposits in pipelines

The Differential Scale Loop DSL is an automated laboratory device that investigates the behaviour of aqueous solutions with regard to the formation of crystalline deposits such as salts and, in particular, lime. To do this, the DSL simulates conditions in the field and in pipework systems such as oil pipelines, water pipes, heat exchangers in industrial plants or geothermal plants at pressures of up to 400 bar and temperatures of up to 300 °C. The differential scale loop is used to test scale inhibitors, scale inhibitors or scale removers, among other things.



The DSL from PSL is the best-selling scale loop in the world. It has been setting new technical standards in scale testing for 20 years. It is used successfully on all five continents.

All important features of DSL

Differential Dynamic Scale Loop DSL

Application Areas of Differential Scale Loop

The Differential Dynamic Scale Loop simulates the conditions in pipework and production systems at temperatures up to 300 °C (572 °F) and pressures up to 400 bar (5,800 psi). It can be used for all solutions with crystalline deposits, e.g. carbonate, sulphate, iron and other deposits, sugar, salt from seawater and geothermal water.

Observation of crystalline deposits like salts or scale in pipelines

Testing inhibitors, antiscalants or scale removers

Testing additives for water treatment and water purification

Develop and optimise scale inhibitors

Investigate hardness stabilisers for aqueous solutions

Quality control

Differential Dynamic Scale Loop with knauer hplc pumps

Short Story about Differential Scale Loop

Right from the start: The new industry standard

Until the market launch of the differential scale loop from PSL Systemtechnik, there were only unsatisfactory scale loops with two HPLC pumps on the market for the customer. Our DSL was the first commercial device with three HPLC pumps. This enabled faster, more accurate and, above all, automated measurements. This novel approach had quickly established itself as the industry standard and almost replaced two-pump systems.

We were able to maintain our pioneering position through continuous further development of the Differential Scale Loop. The software in particular is characterised by an unrivalled range of functions and a high degree of measurement automation, which leads to significantly shorter project lead times.

IN USE WORLDWIDE

Used by Leading Labs

Concept for a long lifespan

Only high-quality and robust materials used

Our well thought-out concept for the differential scale loop leads to a long service life and protects your investment. Only high-quality and robust components from leading manufacturers, primarily from Germany, are used. All components exposed to heat are made of Monel to ensure greater resistance to corrosion from the hot salt solutions. All safety-relevant and expensive components are protected twice, via software limits and additionally mechanically.

Differential Dynamic Scale Loop oven with test loop pipeline

Differential Dynamic Scale Loop: Your benefits

Automatic detection of crystalline deposits

Software-controlled testing and cleaning processes

Automated determination of the optimum inhibitor concentration

Extreme durability ensures a secure investment

Cost-saving due to small sample volumes

Interchangeable model pipeline for further tests

Many expansion options

Developed together with users

The structure of the differential scale loop is modular. The basic device can be easily extended and later retrofitted by the user if required.
The expansion options include:

Differential Dynamic Scale Loop with additional equipment
Model pipeline of Differential Scale Loop with different materials

Simply adapt the test conditions

Interchangeable test capillary for different processes

The test capillary is made of stainless steel as standard and therefore simulates most applications. Different lengths and internal diameters as well as different materials such as copper, aluminium or Hastelloy are available to simulate other process conditions. The capillary can be exchanged quickly and easily.

In order to simulate a wide range of process conditions, measurements can be carried out at temperatures of up to 300 °C and, depending on the model, pressures of up to 400 bar can be built up. The flow rate can also be varied over a wide range.

PSL Online Demo

Online Demo with Differential Dynamic Scale Loop DSL​

During the product demonstration, you will gain many insights into how it works. You can follow the measuring process live and then discuss your questions with our experts.

The most important facts at a glance

Pressure Range 3,4 bar .. 45 / 172 / 400 bar (49 psi .. 650 / 2,500 / 5,800 psi)
Temperature range +30 °C .. +300 °C (86 .. 572 °F)
Flow rate Single pump: 0.1 .. 10 ml/min
Total flow: max. 30 ml/min
Model pipeline Length: 2 m, Inner Ø: 0.75 mm
Material: stainless steel
many options available
Corrosion resistance Hastelloy optionally

Differential Dynamic Scale Loop data sheet

In the product data sheet you will find the exact specification as well as many data and options to help you decide on the Differential Scale Loop.

PSL information

Do you need any further information

We are looking forward to your questions.

WHY PSL?

We set new laboratory standards with our instruments

We have been developing, manufacturing and selling innovative laboratory instruments specifically for Flow Assurance for 25 years, setting new standards in the laboratory for professionals. We have been awarded innovation prizes for this. Our export quota of 90 % earned us the Export Oscar of Northern Germany.

PSL stands for reliability, quality and innovation. We are proud that the Big Five in the industry are among our satisfied customers.

WHAT WILL BE YOUR BENEFIT?

Reliable, high-quality instruments for your success

SAVE TIME IN EVERYDAY LAB WORK

with automated test cycles, cleaning procedures and easy-to-clean parts.

EASY TO USE

with a user-friendly, high-quality design for simple, correct and safe handling.

LONG LIFETIME MADE IN GERMANY

thanks to the sophisticated and robust design as well as the high-quality materials and manufacturing.

TRUSTED SERVICE - WORLDWIDE

with our online support, maintenance contracts and on-site service. We guarantee 20 years of repair service.

MEASURE LIKE INDUSTRY LEADERS

with innovative and advanced instruments, you can measure future-proof like the leading laboratories.

PLEASURE TO MEASURE

Our instruments make work a pleasure. They were developed together with the users.

I would like to know more about the instrument

PSL is your expert for laboratory equipment in flow assurance

Are you interested in other laboratory devices for fouling, scale, hydrates and more?