177HDS – Humidity sensor for wall mounting

177wd-wall sensor-stainless steel

177wd-wall sensor-stainless steel

Humidity sensor with mounting plate for wall mounting.


The 177HDS is a fully stainless steel sensor with a cut away measuring point and has  a rear flange for wall mounting.  This sensor is specifically intended for measuring the relative air humidity.


  • 177HDS: Sensor with rear flange for RH measurement 20-95%, output 0-100% = 4-20mA
  • 177HDSPT: Combination sensor Temperature PT100/3L and RH measurement 0-100%=4-20mA.

Length, diameter, and measurement system as requested with order.

Possible applications
  • Cool/Freeze cells.
  • Computer rooms/Machine rooms.
  • Storage spaces.
Measurement element PT100
Measurement system In 3-lead technology.
Temperature range Standard range up to a max. of 300°C. However this is very much dependent on the chosen materials, connection cables and construction.
For the correct version, please feel free to contact us.
Materials Stainless steel-316. 
Dimensions As requested with order.
Process connection Fixed mounting plate for wall mounting.
Connection cable Screw connection in the connection head, so supplied without cable.
IP-norm  IP-65 (the cut away measuring section of the 177 air probe is not watertight).
(for supplement) 
  • Head transmitter TRM33A, measurement range as requested.
  • Measurement system PT100 1/3 Din selection.
  • Measurement system PT100 1/5 Din selection.
  • Measurement system PT100 1/10 Din selection.



• Brochure
• Further information about dimensions, connection and cables is given on the Support pages.


The delivery of standard types from stocks and customer-specific versions can be within a few days. In view of the large number of versions and options for orders you can contact our sales department tel. +31 50-501 37 45 or by email: