Transmitter – Rotronic Hygrostat – HS5 Series


  • Measures relative humidity and temperature
  • All psychrometric calculations available
  • Outstanding accuracy and repeatability
  • Highest precision
  • Dry mechanical relay
  • Digital communication via Ethernet
  • Freely scalable analog signals
  • Update possible via the Internet

The transmitters in the HS5 series are progressive transmitters for accurate measurement of relative humidity and temperature and can convert these to psychrometric parameters as required by the application concerned. Their measurement results can be read out via analog outputs or Ethernet. A relay switches when the switching threshold that has been set is reached. The instruments measure with interchangeable HygroClip2 probes, enabling an unprecedented class of accuracy. The HS5 boasts a unique calibration and adjustment process and many other unbeatable features. At the same time Rotronic has also improved the sensor technology, taking humidity and temperature measurement to a whole new level of performance and reliability: the HS5 transmitters offer repeatability of < 0.02 %RH and with the HC2-S guaranteed system accuracy of < 0.8 %RH and 0.1 K.

The HS5 series is ideal for wherever exact measurement of humidity and temperature is of critical importance: in the food and pharmaceutical industries, printing and paper industries, meteorology, the agricultural sector, archeology, HVAC applications, etc. There is hardly a sector today in which these parameters can be ignored. The measurement task in question ultimately defines which instrument best covers your needs.



Accuracy at 23 ±5 °C Prob dependent
Parameters Relative humidity and temperature
Probe type All HygroClip2 probes
Device type Hygrostat and thermostat
Range of application -40…60 °C / 0…90 %RH
-10…60 °C / 0…90 %RH with LCD
Measurement range Probe dependent
Switch output 1 relay (freely configurable)
Switching capacity <50 VAC / <75 VDC / <1 A
Power consumption 15…40 VDC / 12…28 VAC
<70 mA (Ethernet version <150 mA)
Response time t 63 Probe dependent
Psychrometric calculations Yes
Display type Illuminated graphic LCD
Electrical connections 1 x M16 x 1.5, to terminals
Initialisation time <5 s
Measurement interval 1 s
Menu Navigation 4 keys (in version with display)
Trend indicator Yes
Firmware update Via HW4 software
External datalogging 2000 Records
Analog outputs 2, freely configurable
Analog output signal (standard) 0…10 V, 4…20 mA, freely scalable
Automatic load compensation Yes
Circuit type 3-wire
Communication interfaces Ethernet
Relay type and number Changeover switch
Fire protection class Complies UL94-HB
Housing ABS
IP protection rating IP65
Mounting Wall Mounting
Service Interface UART
FDA / GAMP FDA 21 CFR part 11 / GAMP5
Temperature adjustment Via keyboard 1-point
Via software 2-point
Humidity adjustment Via keyboard/software: multi-point
CE / EMC conform EMC Directive 2004/108/EC
Dimensions 129 x 72 x 45
Weight 240 g


Rotronic HS5 Hygrostat Series Transmitter-DpstarGroup


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