Temp only vs Temp & humidity sensors

[PaulD]

I have 3 HAI temperature (and humidity?) sensors but I am not sure which versions I have (both temperature & humidity vs temperature only). There is no part number internally or externally that specified one as a 31A00-7 vs a 31A00-8. All 3 are slightly different internally. I am sure I have at least one that includes humidity sensor. Can anyone verify what units I have from info below?
Unit 1 = No calibration dial and no extra small circuit board (in bag with 31A00-7 instruction but I am not 100% it came that way)
Unit 2 = Calibration dial and no extra small circuit board
Unit 3 = Calibration dial and a extra small circuit board (humidity sensor?

 

[ASIHome]

Extra "Small" circuit board in the lower right I believe (arrow pointing up) is the humidity sensor.

 

[Ernie]

Sensors that have a small "riser" circuit board mounted in position "HT1" have humidity capabilities. This would be below and to the right of the imprinted arrow (assuming it is pointing up).

Based on your desciption, you have two (2) temperature and one (1) temperature/humidity sensors.

An easier way to determine temperatur only vs. temperature/humidity and extended vs. standard range temperature, is to look at the part number listed on the circuit board below the terminal strip. They should all have a part number of 31A01-, with a handwritten numeric value:
-1 = standard temp and no humidity
-2 = standard temp and humidity
-3 = extended temp and no humidity
-4 = extended temp and humidity

 

[PaulD]

Sensors that have a small "riser" circuit board mounted in position "HT1" have humidity capabilities. This would be below and to the right of the imprinted arrow (assuming it is pointing up).

Based on your desciption, you have two (2) temperature and one (1) temperature/humidity sensors.

An easier way to determine temperatur only vs. temperature/humidity and extended vs. standard range temperature, is to look at the part number listed on the circuit board below the terminal strip. They should all have a part number of 31A01-, with a handwritten numeric value:
-1 = standard temp and no humidity
-2 = standard temp and humidity
-3 = extended temp and no humidity
-4 = extended temp and humidity

Lajaycee's description matches what I suspected but the dash number scheme you quoted does not fit what I have. All 3 boards show a 31A01-3 Rev A identifier even though one board has a totally different layout from the other 2. The one different board has the HT1 you refer to on it (no card in that position) but the other 2 boards do not have an HT1 marker on them (but one of them has a card in that spot). It looks like the board was revised to make room for the calibration wheel.

I will hook them up and see what I have.