External Dew Point Sensor

DCIM_Support · ‎2020-07-04

This question was originally posted on DCIM Support by David on 2017-11-17

Hi All,

I have a requirement for a Dew Point sensor that can be mounted externally to a building.

I'm having a bit of a problem locating something suitable, so wondered if anyone had experience with this...

Couple of questions:

1 - Are the Netbotz sensors (AP933TH) suitable for mounting externally exposed to the elements? I suspect I know the answer to this already, but thought I would ask anyway...

2 - If not, does anybody have any suggestions for a suitable device that can be mounted externally?

I will need to integrate this sensor to DCE, so it will need to be either SNMP or Modbus 485 / TCP capable...

Thanks 😀

DCIM_Support · ‎2020-07-04

This answer was originally posted on DCIM Support by Steven Marchetti on 2017-11-17

Hi David,

1: As you've guessed, it is not recommended that you install the AP9335TH in an exposed environment.

2: Sorry, I have no info on a 3rd party sensor and yes, to integrate directly to DCE it would need to be Modbus TCP or SNMP. Hopefully we can get another answer from a community member.

There is however a 3rd option. NetBotz are capable of connecting to a 3rd party sensor using either a 0-5v (not the 200 series) cable or 4-20 mA (not the 200 or 300 series) connection. I still have no specific info on any tested dew point sensors but you can find a few on google. For example, this one:

https://store.vaisala.com/us/products/product/HMP110A15A1C3B0/hmp110-humidity-dew-point-and-temperat...

It appears to do 0-5volt for a NetBotz connection as well as Modbus RTU. Together with a modbus gateway, that could communicate using Modbus TCP so you wouldn't need the NetBotz appliance.

Again, I've not tested this specific sensor and can not make any claims about how well (or poorly) it works.

Thanks,

Steve

DCIM_Support · ‎2020-07-04

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