Honeywell 00705-A-1735 705 Replacement Gas Sensors

I. Basic Information
Full Model Number: 00705-A-1735
Brand: Honeywell Analytics (Honeywell Analytical Instruments)
Product Series: 705 HT High Temperature Gas Sensor Assembly
Detection Principle: Sieger Anti-Toxic Catalytic Beads (SG16B) Bridge mV Output
Application: Explosion-proof high-temperature environment-specific combustible LEL detection sensor, the entire set can be directly replaced with spare parts

Model Code Differentiation (Key Comparison of 705 Series) Table
Model Maximum Temperature Resistance Approval Usage
00705-A-1733 65℃ (131℉) UL/CSA standard temperature model General explosion-proof area
00705-A-1735 150℃ (302℉) UL/CSA high-temperature HT model Cabinet oven, engine compartment, high-temperature processes

Core Technical Specifications
1. Temperature Measurement and Environment
Operating temperature: -25℃ ～ +150℃ (long-term stable operation)
Humidity: 20%～90% RH continuous no condensation; intermittent up to 100% RH
Installation thread: 3/4″ NPT external thread, aluminum explosion-proof housing
Power consumption: 0.7W, drive current 200mA ± 2mA (powered by the accompanying controller)
2. Gas Detection Performance
Range: 0～100% LEL (can be cut to 0～20% LEL by the controller)
Minimum alarm threshold: 5% LEL (strong baseline stability, small zero-point drift at high temperatures)
Response time: T60 ≤ 6s; T90 ≤10s
Zero-point temperature drift: ≤ 0.05% LEL/℃ (methane calibration)
Recommended calibration flow rate: 1.5 L/min
Output signal: Three-wire millivolt bridge signal, compatible with Honeywell combustible gas controllers such as Sensepoint XCD
3. Explosion-proof safety certification
UL/CSA certification: Class I Div.1, B/C/D hazardous gas groups
Explosion-proof housing made of aluminum alloy, intrinsically safe explosion-proof, suitable for flammable and explosive high-temperature working conditions
4. Lifespan and consumables
Typical lifespan: ≥ 5 years

The entire assembly includes catalytic detection components, explosion-proof housing, and outgoing cables, as a complete replacement part
4. Typical application scenarios
Gas turbine engine compartments, sealed compartments of internal combustion engines
Solvent printing, high-temperature drying ovens
Chemical high-temperature reaction zones, heating furnaces, heat treatment equipment
Combustible leak monitoring in explosive hazardous areas of petroleum refining and chemical production
5. Compatible controllers and accessories
Compatible host: Honeywell Sensepoint XCD combustible gas transmitter
Optional accessories:
Collector hood 00780-A-0032 (lighter-than-air gases, such as methane)
Outdoor rainproof housing 00780-A-0076
Wiring: Three-wire mV bridge signal, suitable for long-distance wiring (requires matching line resistance)