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Model PT500 Four (4) Channels

Fiberglass & Stainless Steel Enclosures

Model PT500 is a microprocessor-based multi-channel controller that provides up to 4 channels of continuous gas detection. The controller is housed in a Nema 4X weatherproof enclosure. PT500 can be interfaced with any of Pem-Tech's toxic and combustible gas sensors. The controller provides a front panel user interface with alarm LED indicators and large LCD with backlight.

PT500 allows each channel to be programmed for sensor type and discrete alarm levels. Three programmable relays are provided. The alarm relays can be configured to activate on any of the 4 channels' alarm levels for use with external devices such as horn or beacon.

View Data Sheet   Technical Specifications


  • Drilling Rigs
  • Offshore Platforms
  • Petrochemical Industry
  • Chemical Storage
  • Water & Wastewater Treatment
  • LPG Storage
  • Refineries

Key Features

  • Up to 4 detector transmitter interface
  • 4 Lines by 16 Character LCD display
  • Fully programmable alarm relays for Audio and visual alarms and peripherals.
  • On board universal power supply
  • Easy setup via keypad on the front panel


Detector Interface

4 Channel Capacity

All Pem-Tech's transmitters (4-20mA)

Alarm Relays

4 fully programmable relays for 3 distinct levels of alarms.

Relay Type: SPDT Form "C" type contacts
5 Amps @ 250 VAC or 30 VDC

Power Input

110/220 VAC to 24 VDC
* 50 Watt power supply within the monitor enclosure for 4-Channel configuration.

Power Consumption

Nominal 80 mA @ 24 VDC

200 mA maximum with all alarm relays active.

Monitor Only, power consumption of total number of detectors not included)

Display & Visual Indicators

4 Lines by 16 character display with back light. Amber and red LED indicators for sensor Alarm and Fault condition

Operating Temperature

14 °F to 131°F (-10 °C to +55 °)

Approved Enclosure Options

Nema 4X, Fiberglass, IP 65 Wallmount

Nema 7, Explosion Proof Wallmount CSA, UL