Liquid baths with maximum temperature uniformity at "real" -90 °C to +250 °C
Our calibration baths from Kambic are ideal for calibrating temperature probes, temperature transmitters or even complete temperature systems. They allow simultaneous calibration of multiple systems with the added benefit of being able to accommodate probes of all shapes and sizes. Exceptional temperature stability and precise temperature distribution across the entire bath volume ensure that sensors and reference probes always measure a uniform temperature.
Homogenität und Stabilität im mK Bereich
The range of Kambic liquid temperature calibration baths we offer are calibrators with a highly stable temperature control system and a unique temperature uniformity of better than ±0.007 °C across the entire used part of the tank. Depending on the temperature range, Kambic calibration baths are equipped with different cooling systems: These range from simple tap water cooling to integrated refrigeration compressors and even multi-stage cascade compressors for models with extremely low temperatures. The calibration baths are available as laboratory versions, baths with deep tanks and micro calibration baths.
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Unique “Vertical flow design (VFD)”
The precision is achieved using a 2-cylinder system with a uniform vertical flow throughout the utilized portion of the tank while using a finely balanced, high-performance microprocessor control loop.
The unique “Vertical Flow Design (VFD)” guarantees maximum stability and uniformity.
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Customized solutions
We realise customized calibration baths to offer the ideal solution for your calibration application. Describe your requirements and we implement your individual calibration solution.
Special design calibration bath OB-85/2 LT
Calibration bath for high temperatures above +40 °C
High-Temperature calibration bath “OB”
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Temperature range |
+40 to +250 °C |
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Temperature stability (°C) |
±0,001 at 50 °C ±0,002 at 100 °C ±0,006 at 250 °C |
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Temperature uniformity (°C) |
± 0,007 at 100 °C |
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Tank volume |
7, 22 and 50 liters |
“True” -90 °C to +250 °C
Fast heating and cooling rates
Low maintenance & long lasting
Recommended by leading laboratories
Up to 500 mm immersion depth
Metrological world class
Calibration bath for low temperatures down to -40 °C
Low-Temperature calibration bath “OB-LT”
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Temperature range |
-40 to +130 °C |
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Temperature stability |
±0,004 at 40 °C ±0,005 at 20 °C ±0,002 at 100 °C |
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Temperature uniformity |
± 0,007 at 40 °C |
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Tank volume |
7, 22 and 50 liters |
Calibration bath for ultra-low temperatures down to -90 °C
Ultra-Low Temperature Calibration Bath “OB-ULT"
With our low-temperature calibration baths, you can get “real” temperatures of -90 °C to +250 °C for your calibration needs.
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Temperature range |
-90 to +130 °C |
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Temperature stability |
±0,005 at -90 °C ±0,005 at +20 °C ±0,002 at +50 °C |
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Temperature uniformity |
±0,007 at -90 °C |
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Tank volume |
22 and 50 Liter |
Portable calibration bath
With their small dimensions, the portable micro-calibration baths are ideal for applications that need to be done in various remote locations.
Nevertheless, these portable mini-calibration baths offer exceptional performance as well as fast heating and cooling rates.
Portable Micro Calibration Bath OBM
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Temperature range |
+35 to +220 °C |
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Temperature stability (°C) |
±0,002 at + 50 °C ±0,003 at + 100 °C ±0,008 at + 200 °C |
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Temperature uniformity (°C) |
±0,01 at +100 °C |
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Tank volume |
4 liters |
Portable use - independent of location
Usable immersion depth of 210 mm
Uniformity and stability in the mK range
Proven cooling system with compressor technology
Fluid ensures perfect heat transfer
Portable Micro Calibration Bath OBM-LT
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Temperature range |
-35 to +130 °C |
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Temperature stability (°C) |
0,007 °C at -35 °C 0,002 °C at +50 °C 0,003 °C at +100 °C |
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Temperature uniformity (°C) |
± 0,01 °C at +0 °C |
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Tank volume |
~ 4 liters |
Ultra stable maintenance bath for resistance standards
The ultra-stable maintenance baths for reference resistors offer exceptional operating characteristics.
Maintenance baths for resistance standards OB-60 US, OB-100 and OB-110
- State-of-the-art metrological equipment with exceptional performance
- Uniformity and stability in the mK range
- Unique “Vertical flow design (VFD)”)
- Hinged, transparent cover
- Multiple access ports
- Two bath sizes available
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Temperature range |
+5 to +60 °C |
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Temperature stability (°C) |
±0,003 at +23 °C |
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Temperature uniformity (°C) |
< ± 0,007 at +23 °C |
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Tank volume |
60, 100 and 110 liters |
Learn more about the calibration baths for resistance standards
Ultra stable 19 inch calibration bath for resistance standards
19’’ SERVER RACK FLUID BATH OB-19R
Our compact 19 inch server rack size calibration bath provides ultra-stable temperatures in the mK range for resistance standards. 24 hours a day, 365 days a year.
- 19-inch server rack size
- Access for Cables via two section upper cover
- Uniformity and stability in mK range
- Unique vertical flow design
- Active cooling via Peltier
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Temperature range |
+ 15 to + 35 °C |
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Temperature stability |
± 0.002 at 23 °C |
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Temperature uniformity |
± 0.006 at 23 °C |
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Tank volume |
10 liters |
What is a calibration bath?
A calibration bath is a machine equipped with a tank (bath), which allows a liquid to be kept at a precise specified temperature, using a combination of heating, cooling and circulation systems. Temperature sensors, probes and transmitters are calibrated in this liquid by comparison with a known temperature reference.
Here, the preset temperature should ideally match the actual temperature of the bath liquid. Even more important, however, is the stability of the temperature over time and the homogeneity of the temperature across the entire bath volume.
Compared to calibration in air, the advantage of the calibration bath is a much faster heat transfer via the fluid. In addition, more precise temperature control is possible. Calibration baths can offer stability and homogeneity of up to ±5 mK at temperatures ranging between -100 °C and +300 °C. This makes then the perfect equipment for the calibration of high-precision temperature probes, especially those of a more irregular shape that cannot be calibrated in block calibrators.
Common sizes for calibration bath tanks range from 1 to 60 liters. Bath fluids typically consist of special, temperature-stable silicone oil, particularly in high-temperature applications. High-purity alcohol is used in the ultra-low temperature ranges.
Selection criteria for a temperature calibrator
If you need to calibrate industrial temperature probes such as RTDs, thermocouples, thermistors, bimetallic thermometers, or glass thermometers, you need a reliable temperature source to verify accuracy. For calibration applications demanding the highest-quality, a fluid-based calibration bath offers a superior combination of stability, uniformity and value for money.
Typical temperature block calibrators offer stability of around ±0.5 °C over a temperature range of -25 °C to 650 °C. The temperature uniformity between the individual wells, which is important for the comparison of sensors, typically sits at around ±0.05 °C. These uncertainties match the measurement uncertainties achieved by industrial temperature sensors well.
If you need an extended temperature range, highest stability and greater precision, calibration baths are the better choice. Compared to most temperature block calibrators, the Kambic calibration baths excel by having much better temperature stability of up to ±1 mK over a temperature range of -90 °C to +250 °C. The temperature uniformity of a liquid bath, which is a very important characteristic for the comparison of probes, is ±7 mK.
When selecting calibrators for your industrial sensors and probes, you should consider the following criteria:
• temperature range
• accuracy and stability
• flexibility of use and immersion depth of the probe
• portability
• throughput
Do you have general or technical questions about our calibration baths? Do you need more information or an obligation-free quote?
Contact us!
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