Rosemount™ 925FGD Fixed Gas Detector

Features

• Gas transmitter can be fitted with a wide range of combustible gas sensors and recognizes a newly fitted gas sensor, automatically uploading the gas sensor’s specific configuration profile

• Gas sensor and transmitter continuously communicate digitally, providing stable, accurate protection with fast response times even over long separation distances

• Rosemount 925FGD gas detector offers best-in-class performance specifications for combustible gases including accuracy, response time, operating temperature ranges, and zero drift specification

• Achieves ingress protection levels of IP66

• Pre-calibrated gas sensor easily connects to the transmitter and can be factory calibrated to butane gas, propane gas, methane gas, ethylene gas or ethane gas

• Gas sensor can be calibrated off-site and installed later

• Gas sensor retains own configuration settings and calibration information

• Smart sensor module provides reduced maintenance costs and downtime with longer calibration intervals

Specifications

Operating Temperature

-40 to +158 °F (-40 to +70 °C)
-67 to +158 °F (-55 to +70 °C) with heater on

Measurement Type

Gas concentration levels: Hydrocarbon gases: 0-100% LEL

Sensor Type

Rosemount 625 Non-Dispersive Infrared Sensor

Output

4-20 mA with HART® 7 Protocol, Relays

Display/Interface

The integral LCD display can display alert state and diagnostic information.

Humidity Range

0-95% relative humidity, non-condensing

Power Supply

Power supply range: 18 to 30 VDC
Max. power consumption: 4.0 W with heater on

Accuracy

Gas accuracy: ±3% LEL < 50% LEL and ±5% LEL > 50% LEL
4-20 mA accuracy: ±0.1% of span