Designed to detect flammable gases at the lower explosion limit, the Dräger Polytron® 8700 IR is an explosion-proof transmitter equipped with the Dräger PIR 7000 infrared sensor. This sensor ensures quick detection of various hydrocarbon gases. The device supports a 3-wire 4 to 20 mA analog output, relays, and communication via Modbus and Fieldbus for wide compatibility with control systems.
• Efficient, stable and robust—the Dräger PIR 7000
• Easy device management via digital communication
• Same design, same operating principle
• Three relays for controlling external equipment
• Safe, robust housing for every application
• Make the impossible possible with the remote sensor
• Data logger
For the detection of combustible gases in the lower explosion limit (LEL). It uses a high performance infrared Dräger PIR 7000 sensor, which will quickly detect most common hydrocarbon gases. Besides a 3 wire 4 to 20 mA analog output with relays, it also offers Modbus and Fieldbus making it compatible with most control systems. The unique 4 beam signal stabilizing system makes the sensor resistant to dust or dirt deposits on the optical surfaces. Environmental and aging effects are compensated ensuring long term, drift free operation.
Type
Explosion proof / flameproof enclosed transmitter (“d”) or combined with increased safety (“d/e”)
Gases
Flammable gases and vapours
Measuring range
0 to 20 … 100 % LEL
Display
Backlit graphic LCD; 3 Status LEDs (green/yellow/red)
Signal output analogue
4 to 20 mA, 3- or 4-wire, sink or source
Signal output digital
HART® w/ 3- or 4-wire, PROFIBUS® PA, FOUNDATION fieldbus™ H1 and Modbus RTU w/ 4-wire
Temperature
-40 to 65 °C (-40 to 149 °F) without relay
Pressure
20.7 to 38.4 inch Hg / 700 to 1,300 mbar
Transmitter housing
Epoxy coated copper-free aluminium or stainless steel SS316 L
Enclosure protection type
NEMA 4X & 7, IP65/66/67
Cable entry point
3/4” NPT threaded holes or M20 cable gland
Dimensions (H x W x D), approx.
11.0” x 5.9” x 5.1” / 280 × 150 × 130 mm
Weight, approx.
w/o docking station Aluminium 4.9 lbs / 2.2 kg
w/o docking station SS316 L 8.8 lbs / 4.0 kg
