Introduction - Honeywell Sensepoint Technical Manual

The Sensepoint gas detector consists of a certified enclosure fitted with a replaceable certified gas
sensor that can be used to detect gas indoors or outdoors in ATEX certified hazardous areas in
Europe, and also in safe areas. It is protected against water and dust ingress to IP65 (IP66 with
Weather housing
fitted).
½" NPT
Cable Entry
Cover
Gasket
Lid Captive
Securing Screws
(4 off)
The detector is supplied with one of 3 types of sensor to monitor different gases present in ambient
air:
• Flammable
• Toxic
• Oxygen
Flammable detector (%LEL) — this version measures flammable gas concentrations below the
Lower Explosive Limit (LEL) of the target gas for which it is calibrated. It features a poison-resistant
catalytic pellistor sensor device which forms part of a bridge measuring circuit.
Toxic detector — detects toxic gas, present in ambient air. Detectors measuring gas in parts per
million (ppm) concentrations are available for detecting carbon monoxide (CO), hydrogen sulfide
(H2S), hydrogen (H2), sulfur dioxide (SO2), nitrogen dioxide (NO2), and ammonia (NH3) gas. The
Toxic and oxygen detectors feature a local amplifier for operation as part of a 4-20 mA circuit.
Oxygen detector — measures oxygen deficiency levels in air in percent by volume (%V/V)
concentrations.
The detector gas type is shown on a label on the enclosure's lid.
2106M0525 Iss 2 Nov 05

Introduction

Mounting Lug
Terminal Block
3/4" NPT Cable Entry
Earth Continuity
Earth Plate
Plate
Sensor
Lock Nut
Sensor
Introduction
Enclosure
Base
(GRP)
M20
Cable Entry
Earth
Terminal
7