Assortment / System Description

Powers® Line Voltage Pressure-Electric Switches
The SW 134 Pressure Electric Switch actuates electrical circuits from pneumatic control signals.
The 134 Pressure Electric Switches are heavy duty pressure-actuated, mechanical contact type
switches used to open or close electrical circuits from pressure signals in pneumatic control
systems.
The QBM Series Air Differential Pressure Devices use a proven sensing technology to deliver
accurate and repeatable data in applications that require monitoring of differential pressure.
Part Numbers: 134-1450, 134-1451, 134-1460, QBM81-3, QBM81-5, QBM81-10
Technical Instructions
(134-1450, 134-1451)
Technical Instructions
(134-1460)
Technical Instructions
(QBM81-X)
Powers® Line Voltage High and Low Temp Pneumatic Air Switch
TH 134 Pneumatic High and Low Temperature Detection Thermostats have an internal
pneumatic switch that exhausts air from the line to a controlled device when the temperature
reaches the set point. They require manual reset to close the switch.
Part Numbers: 134-1700, 134-1710
Technical Instructions
Powers® Electric Line Voltage Mechanical Humidistat
The line voltage humidistat is a wall-mounted instrument with SPDT snap-acting contacts to
control humidifying or dehumidifying equipment. The 134 Humidistat has a setpoint range of 0
to 70% RH as well as “OFF” dial positions for humidification and dehumidification and is
suitable for residential, commercial, and industrial applications.
Part Number: 134-1861
Technical Instructions