Det-Tronics 505A3A2A1W

Model 505 Combustible Transmitter and Junction Box

  • Factory New
  • Material Obsolete
Brand: Det-Tronics Part #: 91580 Categories: , Manufacturer Part #: 505A3A2A1WSecondary Part #: 006748-002 Tag:


The Model 505 Transmitter is used with one constant voltage catalytic gas sensor to provide a linear 4 – 20 mA output signal corresponding to a 0 to 100% LFL gas concentration. Intrusive calibration and sensor sensitivity checks are performed using a standard digital voltmeter (not provided). An explosion-proof junction box with removable cover is included with all Model 505 Transmitters. Options include junction box material (aluminum or stainless steel), number of conduit entry ports (up to five), conduit entry threads (NPT or Metric), orientation of entries (180 degree straight-through or 90 degree “L”), and signal output load impedance (125 or 500 ohms).


Weight 8.90 lbs


Production Status

Product Notes

No replacement available at this time.


  • Linear 4 – 20 mA output.
  • Current level indicates fault condition and calibrate mode.
  • Sensor sensitivity check.
  • Suitable for use in a wide variety of combustible gas detection applications.
  • Compatible with all Det-Tronics catalytic sensors.
  • Direct field replacement for Det-Tronics K Series and Model 500 Transmitters utilizing existing wiring and junction boxes.
  • Explosion-proof junction box available in aluminum or stainless steel with up to five ports two port model available in 90° or 180° configuration.
  • FM, CSA, ATEX/CE and IECEx Certified.


Combustible Gas Detector Transmitter; Model 505
Det-Tronics – Data Sheet
Flame, Gas and Systems
Det-Tronics – Product Catalog