► Measuring Ranges:
Frost/Dew Point -20…+70 °C
Relative humidity 5…99 %rh *
Temperature -50…+100 °C **
► Accuracy:
Frost/Dew point ≤ ± 0.1 °C
Temperature ≤ ± 0.07 °C
► Reproducibility:
Frost/Dew point ≤ ± 0.05 °C
Temperature ≤ ± 0.03 °C
Overview
The 473-SH2 is a chilled mirror dew point hygrometer with a cable mounted measuring head with an integrated sample flow control fan and high precision temperature measurement.
It is particularly well suited for use in climatic chambers or humidity generators where it functions as a calibration transfer standard for dew/frost point, relative humidity and temperature.
The 473-SH2 includes precise measurement of temperature with a 2 x 100 mm platinum resistance thermometer (PRT) that can be connected directly to the SH2 measuring head, or to the 473 display.
Features
- Cable mounted dew point mirror
- Sample gas flow fan
- Integrated temperature probe
- User replaceable optical components
- Easy mirror access for cleaning
- Optional barometric pressure measurement
Key Specifications
Measuring Ranges:
Frost/Dew Point -20…+70 °C
Relative humidity 5…99 %rh *
Temperature -50…+100 °C **
Accuracy:
Frost/Dew point ≤ ± 0.1 °C
Temperature ≤ ± 0.07 °C
Reproducibility:
Frost/Dew point ≤ ± 0.05 °C
Temperature ≤ ± 0.03 °C
* Please note the operating conditions: The measuring head as well as the connectors must be operated under non-condensing conditions.
** The maximum temperature of the SH2 measuring head is 80°C, so to measure temperature up to 100 °C requires the temperature probe to be cable mounted.
Typical Applications
- Climatic chamber validation
- RH generator transfer standard
- Calibration reference
- Engine Test Cells
- Process validation
Accessories
Measuring Head SH2
Part No. 105001
The SH2 is a flow-through dew point measuring head with a two-stage Peltier element for mirror temperature control. It includes a variable speed fan that maintains a consistent airflow across the mirror. Alternatively, with the fan removed, the SH2 head can also connect to applications using tubing and standard 6 mm or ¼” fittings. It is also supplied with a calibrated temperature probe with 0.5 m and 3 m cables for connection to either the measuring head or the 473 back panel.
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