Application Notes

EAP-032085

Monitoring for Air Duct Control

We plan to install a damper gear on fresh air supply duct for air volume adjustment purpose. We are going to measure the damper gate opening/shutting signal on the indicator at field end and control room end. The damper gear includes 125 ohm potentiometer as gate opening detector. We want to get 1-5 Vdc for field indication and 4-20 mAdc for control room indication. Other condition we need is small sized conditioner so that we can install it into existing small field panel. Does M-System have the conditioner fit to this application?

We’d like to recommend our potentiometer transmitter, the W5MS.
The W5MS is super-mini sized terminal block shaped transmitter which provides two (2) isolated DC output proportional to a potentiometer input. Therefore this is the available unit especially when you have to install instruments in limited space of existing panel.
Just for your information, when you select 4-20 mA for both output 1 & 2, the each output can be used to 550 ohms as load resistance.