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Humidity

Humidity is one of the most important measured parameters next to temperature. Humidity is water molecules in the air, and many chemical reactions, drying processes, meteorological conditions, and indoor comfort, are influenced by it.

We have to distinguish between absolute and relative air humidity. Absolute humidity is the weight of the water content in the air, the water density. The unit of measurement is g/m3. Relative Humidity represents the percentage of the maximum possible quantity of water vapour in the air with a reference to the temperature at the time of measurement. The unit of measurement is %.

Sigma offers a variety of digital indicators and controllers to interface with the available sensors.

Model 608

Model 608 is a compact Humidity, Dew point & Temperature monitor with guaranteed accuracy over the whole range (2...98 %RH), a humidity sensor not affected by condensation, LCD 2 line display that can be read from a long distance and 9V battery. Alarm display optional with model 608-2. Ideal for storerooms, cleanrooms, nurseries, etc.
Dimensions: (W/H/D) 120 mm / 89 mm / 40 mm
Measuring range: 2...98 %RH, -10...+70 °C, -40...70 °Ctd
H110 Humidity Sensor
Measuring ranges
Ambient model: from 0 to 95 %RH
Duct mount model: from 0 to 95 %RH
Terminal block model: from 0 to 95 %RH

Technical data
ABS housing – IP 65 (remote and duct mount models) and IP 20 (ambient model)
With or without 10-digits LCD display
0-10 V or 4-20 mA output
Housing with simplified mounting system
Software or DIP switch configuration
Quick and easy mounting with the 1/4 turn system with wall-mount plate

HT110 Humidity & Temperature sensor
Measuring ranges
From 5 to 95 %RH
Ambient model: from 0 to +50°C
Duct mount model: from -20 to +80°C
Remote model: from -20 to +80°C.

Technical data
ABS housing – IP 65 (remote and duct mount models) and IP 20 (ambient model)
With or without 10-digits LCD display
0-10 V or 4-20 mA output
Housing with simplified mounting system
Software or DIP switch configuration
Quick and easy mounting with the 1/4 turn system with wall-mount plate

HT210 Humidity & Temperature sensor
Measuring range
From 5 to 95 %RH
Std ambient model: from 0 to +50°C
Plastic remote probe: from -20 to +120°C
Inox remote probe: from -40 to +180°C

Technical data
ABS housing IP 65
With or without 2-lines 19-digits LCD display
0-5/10 V or 0/4-20 mA outputs
Software or keyboard configuration
Quick and easy mounting with the 1/4 turn system with wall-mount plate

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