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Magnahelic gauges only measure static differential, a photohelic gauge has has alarm contacts for low and high set points.
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∙ 12y ago
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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.
What is the Difference between screw gauge and spherometer?
The difference between screw gauge and spherometer is that spherometer can measure the dimensions of spherical surfaces but screw gauge cannot
Difference between pressure gauge and vacuum gauge?
A pressure gauge measures blow, a vacuum gauges measures suck
What is the difference between transmitter and gauge?
transmitter means to carry towards signal or panel & gauge means to indicate at on spot by clock.
Difference between pressure gauge and manometer?
A manometer is a pressure gauge, "Manometer" reads extremely low pressures that are very close to atmospheric pressures, "pressure gauges" read much larger pressures.
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.
What is difference between 20-gauge and 28-gauge?
20 gauge is larger
What is the Difference between screw gauge and spherometer?
The difference between screw gauge and spherometer is that spherometer can measure the dimensions of spherical surfaces but screw gauge cannot
What is the difference between a 20 gauge and a 12 gauge?
The size of the bore.
What is the difference between normal pressure gauge and differential pressure gauge?
A pressure gauge indicates actual pressure and a differential pressure gauge indicates the difference in pressure.
What is the difference between a twelve gauge and twenty gauge shotgun?
Size of the bore.
What is difference between 16 and 18 gauge steel?
16 gauge is thicker than 18 gauge.
What is the difference between 12 gauge and 20 gauge shotguns?
12 has a bigger bore.
What is the difference between a 410 and a 12 gauge shotgun?
Size of the bore. 12 gauge is bigger.
What is the difference between a 12 gauge shotgun and a 20 gauge?
Size of bore, size of ammuntion
Difference between pressure gauge and vacuum gauge?
A pressure gauge measures blow, a vacuum gauges measures suck
What is the difference between OO and HO gauge?
They are different sizes.
