RFQ

Honeywell 705 Combustible Gas Sensor

  • NG # 03124-HW-HONEYWELL-372

  • MF # 2430K0001

The Honeywell Model 705 Combustible Gas Sensor is a fixed gas sensor designed for continuous detection of flammable and combustible gases in hazardous industrial environments. The 705 uses a matched pair of poison-resistant catalytic gas detection elements and provides a standard 3-wire mV bridge output for connection to a compatible gas controller or field transmitter.

Manufactured By :
Honeywell
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Overview

The 705 High Temperature (705 HT) version is particularly suited to applications where gas detection equipment must operate in high-temperature locations. It can operate from -25°C to +150°C, making it suitable for applications such as turbine enclosures, drying ovens, and solvent-based printing and coating equipment. Its stable baseline allows alarm settings as low as 5% LEL.

Specification

SpecificationDetails
Product TypeFixed combustible gas sensor
Detection PrincipleCatalytic / combustible gas detection
Gas TypeFlammable gases
Output3-wire mV bridge
Measuring Range0–20% LEL to 0–100% LEL, depending on controller
Minimum Alarm Setting5% LEL
Operating Temperature-25°C to +150°C for 705 HT
Humidity20–90% RH continuous; 10–99% RH intermittent
Maximum Pressure110 kPa
Response TimeT60 < 6 seconds; T90 < 10 seconds
RepeatabilityBetter than ±2% LEL
Zero Stability< ±3% LEL with temperature, humidity and pressure
Long-Term Stability< ±5% LEL/year
Power Consumption0.7 W at 200 mA
Warm-Up TimeApproximately 30 minutes
Mounting Thread3/4-inch NPT
EnclosureHigh-grade aluminum, explosion-proof construction
Ingress ProtectionNEMA 4X
Sensor Dimensions78 × 55 mm
Sensor WeightApproximately 200 g
Typical Operating LifeMore than 5 years

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