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Temperature Source


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PR522 Water Bath.jpg
PR512 Oil Bath.jpg
PR532 Series Cooling Bath.jpg
PR533 Constant Speed Temperature Change Bath.jpg

PR522 Water Calibration Bath

1.Temperature control system adopts PID temperature control technology, precision can reach 0.01 ℃. 2. Air - cooled compressor is adopted for refrigeration with high speed and low noise. 3. Standard calibrated cartridge for thermometer, platinum resistance, thermocouple, etc 4. Inside groove adopts arc lateral mixing structure, the structure design of precision and enhance the uniformity of the temperature field, can reach 0.01 ℃. 5. RS232 or RS485 communication interface can be optional to realize data transmission with PC or PLC, remote control. 6. Standard calibrated cartridge for thermometer, platinum resistance, thermocouple, etc.

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The PR500 series uses liquid as the working medium, and the bath controlled by the PR2601 precision temperature controller module, which is specially designed for temperature source by PANRAN R&D department .They supplemented by mechanical forced stirring form a uniform and stable temperature environment in the working area for verification and calibration of various temperature instruments (e.g. RTDs, glass liquid thermometers, pressure thermometers, bimetallic Thermometers, low temperature TCs, etc.).The PR500 series are designed with touch screens, which is visual, facilitates operation, and provides a wealth of information such as temperature stabilities and power curves.

Products Features:

1.Resolution of 0.001℃ and accuracy of 0.01%

Conventional liquid baths typically use a general temperature regulator as the control process of temperature controller, but the general temperature regulator can achieve a only 0.1 level accuracy at best. The PR500 series can achieve a measurement accuracy of 0.01% level by using the PR2601 precision temperature controller module independently developed by PARAN and the resolution is up to 0.001℃. In addition, its temperature stability is much better than other bath which used general temperature controller.

2.Highly intelligent and easy operation

The highly intelligent nature of the PR500 series liquid bath is reflected in the cooling bath. Conventional cooling bath rely on manual experience to determine when to switch compressors or cooling cycle valves. The operation process is complicated and incorrect operation can result in damage to the equipment hardware. However, the PR530 series only needs to manually set the required temperature value, which can automatically control the operation of heating, compressor and cooling channels, greatly reducing the operational complexity.

3.AC power abrupt change feedback

The PR500 series has a AC power adaptation function, which tracks AC power stabilities in real time, optimizes output regulation, and avoids the adverse effects of AC power abrupt change on stability.

Basic Parameters & Model selection table

Product nameModelMediumTemp rangeTemp. field Uniformity(℃)StabilityAccess Opening (mm)Volume (L)WeightDimensionPower


(L*W*H) mm(kW)
Oil bathPR512-300Silicone oil90~3000.010.010.007150*48023130650*590*13353
Water bathPR522-095Soft waterRT+10~950.0050.010.007130*480150650*600*12801.5
Refrigerated Temperature Calibration BathPR532-N00
PR532-N40Anhydrous alcohol/soft water-40~952
Portable oil bathPR551-300Silicone oil80~3000.010.010.0280*280515365*285*4401
Portable cooling bathPR551-N30Soft water-30~1000.010.010.0280*2805181.5
PR551-150Low temp. Silicone oil-30~1501.5


The Cooling calibration bath thermostat is suitable for all departments of metrology, biochemistry, petroleum, meteorology, energy, environmental protection, medicine, etc., and manufacturers of thermometers, temperature controllers, temperature sensors, etc., to test and calibrate physical parameters. It can also provide thermostatic source for other experimental research work. Examples: grade I and ii standard mercury thermometers, beckman thermometers, industrial platinum thermal resistance, standard copper-constantan thermocouple verification, etc.


1. 12 months warranty for thermostatic instruments.

2. Technical support is also available timely.

3. Reply your enquiry within 24 working hours.

4. Package and shipping worldwide.

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Changsha Panran Technology Co., Ltd.

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