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Humidity Calibrators Calibration system for moisture measurement

Humidity Calibrators Calibration system for moisture measurement

Using our humidity calibrators you can precisely generate defined humidity environments, allowing you calibration of humidity probes, humidity sensors and moisture transmitters as well as traceable moisture measurements.

The reliable calibration of data loggers with humidity sensors, humidity probes and transmitters is a special task that requires high-quality systems. Many companies who want to save time and money can do so by performing humidity calibration themselves. This raises the question of which humidity generator is the right one for the respective requirement. As with many other systems, there is the vision of an “ideal” humidity generator that is accurate, inexpensive, fast, easy to use, and very reliable.


Humidity generator - Kambic C3-50 

The humidity generator C3-50 is the perfect tool for calibrating probes and sensors for air temperature and relative humidity.

The exceptional precision of the chamber is achieved via a two-way flow-mix system for humidity control and an outstanding Peltier cooling and heating system. This results in unparalleled humidity stability of less than 1% and a humidity distribution of less than 2% over the entire humidity range

Tailored calibration accessories also ensure easy handling.

Features - Humidity Generator C3-50

  • Metrological performance at the highest level
  • Outstanding stability and uniformity for both temperature and humidity
  • Stable, quiet and vibration-free
  • Convenient front access - side access for cables and probes
  • Humidity control via two-way flow-mix system
Data sheet calibration chamber C3-50
Humidity and temperature calibrator C3-50

Ultrastable environment for defined humidity and temperature





Humidity Calibration Chamber - Kambic C3-50
Temperature range +10 °C to +55 °C
Temperature stability ±0.02 °C 
Temperature uniformity ±0.5 °C (relative to any point in the chamber)
Relative Humidity 5 to 95% RH
Humidity stability ±0.2 %RH @ 21 °C and 50 %RH
(better than ±0.8 %RH over the entire humidity range)
Humidity uniformity Better than 2 %RH over the entire humidity range
Time until stable setpoint 40 minutes to any point in the
working range
Access openings 1 x Ø40 port on the outside left as standard
(Ø40, Ø50 and Ø90 as optional accessories)
(different door options)
Chamber volume 57 Litres
Do you have individual requirements for a humidity generator? Contact us for a custom-made configuration!

Temperature and humidity stability at +35 °C and 85% RH:



Models - Humidity Generator Kambic C3-50

1. Standard

2. Door with two flange connections and two multi-layered insulating windows

3. Door with two flange connections
(one multi-layer insulating block,
one multi-layered insulating window)

4. Door with two flange connections
and two multi-layer insulating blocks






Dew point mirror - MBW 473

The dew point mirror model 473 is a portable instrument equipped with a remote measuring head for selective and continuous measurement of dew point and temperature in air and gas mixtures. Based on the chilled mirror principle, the MBW 473 dew point mirror ensures direct and accurate humidity measurements.

With the dew point mirror you are able to perform precise dew point measurements and measurements of other parameters such as relative humidity. The humidity measurement principle of the MBW 473 is based on temperature controlled condensation, a measurement technique that ensures high precision, stability and reproducibility of the results.
Highlights - MBW Dew Point Mirror 473
  • Stable humidity measurement of the highest precision
  • Remote measuring heads including temperature sensor
  • Direct measurement without sample tube
  • Optional barometric pressure measurement
  • Optional analogue outputs ±10 V and 4-20 mA
  • LCD color touch screen with intuitive user interface
  • Verifiable calibration
Data sheet Dew Point Mirror MBW 473

Precision dew point meter Optidew Vision



Connect and get started
The system is ready for immediate use.



Digital I/O
The 473 is equipped with an RS-232 digital output for recording or remote telemetry of the measured and calculated values.



Calibration check function
With the integrated ice test feature, you can check the calibration at any time to ensure system accuracy and integrity.



Remote measuring heads with temperature probe
The 473 offers several cabled measuring head options. These are designed for direct placement in chambers and other environments. For accurate temperature measurements and relative humidity calculations, these are available with a PRT. To measure the ambient temperature, a separate temperature sensor is either mounted on the measuring head or available as a separate remote sensor with connection to the back of the instrument.


LCD display with touch screen

The 473 features a full-color, high-contrast LCD touch panel with a wide viewing angle for easy operation and readability.  The buttons and menus on the display allow you to configure each line of the display for a variety of humidity, temperature and pressure parameters that can be displayed in either SI or non-SI units. A simple press of a button toggles each parameter between numeric or graphic format.



Integrated pressure measurement (optional)

The optional pressure measurement allows for compensation of pressure differentials at the measuring point, thus minimizing measurement uncertainty. The pressure sensor is available with a measurement accuracy of 0.1% or 0.01%. By combining high-precision dew point, temperature and pressure measurements, the 473 can be used as the reference standard for all three parameters.



Dew Point Probes

Dew point probe RP2

The dew point probe RP2 features a two-stage Peltier element in a compact format sensor and has a connection point for temperature measurement. It comes with a calibrated temperature sensor and an extension cable to allow for optimal placement in the environment to be measured.

The dew point sensor RP2 is particularly suitable for direct use in air circulation environments such as humidity generators, climatic chambers, air ducts and quantification of manufacturing processes.

Dew point probe SH2

The dew point probe SH2 features a two-stage Peltier element for controlling the mirror temperature. The measuring head is equipped with a controllable fan, which generates a uniform airflow over the mirror. If the fan is removed, the measuring head can be connected to a sample gas tube via a 6 mm or ¼“ screw connection. The probe head is supplied with a calibrated temperature sensor and two different connection cables; a 0.5-meter cable for connection to the measuring head and a 3-meter cable for connection to the back of the instrument.

The SH2 measuring head is especially suitable for climate chamber validations, use in humidity generators, fuel cell tests and on-site calibrations.


Models - MBW Dew Point Mirror

The MBW 473 is available in a number of different models, including 473-RP2 and 473-SH2. Specifications for each model can be found in the following table:

Model 473-RP2
473-SH2
Measurement ranges
Frost/Dew Point -20 °C to +70 °C -20 °C to +70 °C
Relative humidity 5 to 99 %RH 5 to 99 %RH
Temperature (via cable PRT) -20 °C to 80 °C -20 °C to +80 °C
Accuracy
Frost/Dew Point ±0.15 °C ±0.1 °C
Temperature ±0.07 °C ±0.7 °C
Repeatability
Dew/frost point ±0.07 °C ±0.05 °C
Temperature ±0.05 °C ±0.05 °C
Standard Features
External temperature sensors Ø3 x 30 mm PRT, 0.5 m lead Ø3 x 100 mm PRT, 0.5 and 3 m lead
Digital interface RS-232
Sensor for mirror temperature Platinum resistance thermometer (Pt-100)
Sample gas connection 6 mm or ¼“ Swagelok (SH2 only)
Carrying case Peli 1550, customised and equipped with foam
Power lead 2.5 m
Calibration certificate Factory calibration: 5 points FP/DP, 3 point temperature
Options
Internal barometric pressure sensor 0.1% or 0.01% accuracy, 700 to 1,200 mbar
Analogue outputs Two analogue outputs, selectable -10 V to +10 V and 4 to 20 mA
Calibration upgrade Upgrade to SCS accredited ISO17025 calibration


Other solutions that might interest you:


MBW Dew point mirror


MBW dew point hygrometers are used worldwide by standardization laboratories on national, accredited and industrial levels. These dew point mirrors are available in different versions for freezing and dew points from -95 °C to +95 °C. Our MBW dew point mirrors have all the required features to produce reliable and accurate measurements in a variety of conditions.

Dew point mirror for chamber validation

Dew point mirrors typically have a higher standard of measurement than those systems integrated into climatic chambers, and are hence used by manufacturers and users as a maintenance and testing tool. The dew point and temperature measurement via a remote measuring head allows the use in the test area with low measurement uncertainty.

The freeze/dew point measurement can be combined with a multi-channel temperature measurement system such as the MBW T12. Using such a measurement system, spatial temperature and RH distribution can be measured, displayed and recorded for validation purposes.

Using a chilled mirror instrument typically reduces the total measurement by up to 50% compared to using standard probes. This is the result of less long term drift, more accurate temperature measurement, and less uncertainty of the accredited dew point calibration.

  • Low-drift measurement of dew point and temperature
  • Automated gas sampling at temperatures up to 100 °C
  • Chilled mirror probe for direct insertion into the working volume of the chamber
  • Self-priming measuring heads
  • Simultaneous measurement of temperature for calculating relative humidity
  • Completely self-contained and easily transportable
  • Integrated calibration verification function for on-site verification of device performance

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