 Pressure / Relay
Controllers
The Gauged Pressure Relay-Recorder contains no mercury products, and is safe for the most demanding environments.
The controller is designed to meet a variety of applications requiring simultaneous pressure monitoring, recording and relaying functions. The
package is comprised of two components, the Gauge Transducer and Relay-Recorder. The Gauge Transducer utilizes highly reliable Bourdon Tube
technology and features a highly accuracy conductive plastic potentiometric sensor. The separately mounted Relay-Recorder combines an electrically
driven chart recorder with a solid state control circuit.
The control circuit conditions the signal from the Gauge Transducer to simultaneously drive the chart recorder and provide a
signal to the relay control circuit. The control circuit provides two sets of user adjustable non-interactive calibrated dials for establishing
the overpressure (set) and underpressure (reset) switch functions. The set points have an adjustable deadband that can be set as close as 2
psi up to 100% of the transducer range. The switch also has a visible on/off indication in the form of a bi-colored LED.
The set points can be easily adjusted without removing power or shutting down the process. The switch function is performed
by a standard electromechanical relay with DPDT contacts so that both a control function and alarm function can be performed simultaneously.
The combination of these features affords an economical and reliable means of establishing pressure limits while recording existing conditions
and providing a gauged pressure indication at the same time.
The model 3500RD-300 Relay and 3500GB-600 Gauge combination is FM Approved for use in Diesel Engine Driven Fire Pump Controllers
and can be used to satisfy the requirements of a pressure-activated relay and chart recorder for automatic controllers of all kinds.
Please contact or email
us to discuss your needs
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