Viking Controls, Inc. - Home
 September 28, 2021

8/5/2004 - Humidity
Humidity (or relative humidity) controls are primarily used for two applications:


A wall or duct mounted humidistat, often single pole double throw (SPDT) contact will use a humidity sensitive element that changes itís length as the humidity changes. This is used to actuate the switch to turn on or off a humidifier or de-humidifier (refrigeration unit).

Similarly, a wall or duct humidity transmitter will send a voltage signal to a controller that is proportional to the relative humidity percentage, enabling the controller to stage or modulate an electronic or steam humidifier or chilled water valve or mechanical cooling unit.

| 1 of 1 |
Technical Tips - Index
  Our Quote Request will enable you to inform us of your needs. Attach your list to the email and we will follow through with your request.
Viking Controls Recycles
Recycle your old thermostats - it's good for the environment!

Did you know that the mercury in one thermostat could cause serious harm to public health and the environment, especially when discarded in the garbage?

Bring your old mercury thermostats to Viking Controls for proper disposal. For more information about mercury recycling and to find a recycle drop off center in your area, visit

VAV Balancing Sensors

Simple plug in of the NS-ATV7003-0 will make the balancers job a snap.


Call 603.881.4830 or
Copyright © 2021 Viking Controls. All Rights Reserved.