E2638 Solvent Vapors PID Transmitter


  • Highly sensitive Photo Ionization Detector
  • Range 0…40 or 0…200 ppm isobutylene
  • Resolution 1 ppb or 1 ppm isobutylene
  • Two SPST relays option
  • 2 × 4-20 mA or 0-10 V, RS485

Volatile organic compounds detector-transmitter E2638-PID is a member of new PluraSens® family of multifunctional measurement instruments.

The instrument utilises highly sensitive photoionization detectors (PID) with extremely low minimal detection levels. The transmitter exhibits sensitivity to compounds with ionization potential less than 10.6 eV, i.e. to most solvent vapors.

Two relays with closing contact (optional) may be used for remote signalling or concentration control. Two alarm set-points are user settable.

Two analog outputs and RS485 digital interface with industry standard Modbus RTU protocol can be used to connect the detector to safety or building automation systems.

Technical Data
Detected vapors acetone, ethanol, toluene, xylene etc
Default calibration isobutylene
Sensor type Photo Ionization Detector
Sampling method diffusion
Detection range 0…40 ppm isobutylene
0…200 ppm isobutylene
Resolution 1 ppb C4H8 for 40 ppm range
1 ppm C4H8 for 200 ppm range
Sensor lifetime 5 years
Power supply 12…36 VDC (default),
24 VAC or 230 VAC as options
Digital interface RS485, Modbus RTU protocol
Analog outputs 2 × 4-20 mA / 0-10 V, user settable
Output relays (option) 2 × SPST relays (closing contact),
250 VAC / 30 VDC, 5 A max
Enclosure grey ABS plastic, wall mount, IP65
Dimensions H90 × W145 × D55 mm
Operating conditions -40…+65 °C, < 95 %RH

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