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Difference between photohelic and magnahelic gauge?
A photohelic gauge measures and displays pressure differentials and can also control devices based on those readings. A magnahelic gauge, on the other hand, measures positive, negative, and differential pressures but does not have control capabilities.
What does the word photohelic mean?
"Photohelic" typically refers to a type of pressure switch or gauge that combines both pressure measurement and control functions with the option for visual monitoring or recording through photography. It is commonly used in industrial applications to measure and control air pressure in ventilation systems.
What does Photohelic mean?
Photohelic is a trademarked name for a type of pressure switch and pressure gauge combination device manufactured by Dwyer Instruments. It combines the functions of measuring and controlling pressure in one unit, with the ability to set high and low pressure setpoints that trigger electrical switches for control purposes.
Difference between photohelic and magnahelic guage?
PHOTOHELIC® Pressure ControlPHOTOHELIC® models combine the MAGNEHELIC®gauge with a precise pressure switch that lets you control low and high gas pressures. Knob controls adjust dual set points, which allow for variable deadband control. These set points contain photocells that actuate DPDT relays when room pressures reach a preset upper or lower limit, and they can be set up to control corrective damper action. As the room pressure changes in response to damper motion, and the indicator returns to the null band, damper motion is halted.
