This product is no longer available and has been replaced by: EE181-L.
HMP35A Temperature and RH Probe
Services Available
Repair No
Calibration Yes
Free Support No


The HMP35A Temperature and RH probe was replaced with the HMP35C; the HMP35C was eventually replaced with the HMP45C-L. Initially, the HMP35A was Vaisala's production line model that had a Platinum Resistance Thermometer (PRT) for measuring temperature and a HUMICAP-H sensor for measuring relative humidity. It required continuous 12 V power; no switching circuit was included.

Campbell Scientific eventually modified the HMP35A to include a 107 for measuring temperature. For about a month, Campbell Scientific continued to call the modified probe, the HMP35A. Eventually, Campbell Scientific renamed the modified probe the HMP35C.



Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
21X (retired)
CR10 (retired)
CR10X (retired)
CR23X (retired)
CR500 (retired)
CR5000 (retired)
CR510 (retired)
CR9000 (retired)

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