Emerson Rosemount 936, Reference Manual

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1 Product overview
The Rosemount 936 Gas Detector employs an advanced xenon flash source and
integrated electronics package, both housed in stainless steel housings to provide high
quality and performance, fast response, and line of sight gas monitoring. The source/
detector is backed by a three year warranty.
The detector is manufactured with heated optical windows to improve performance in
icing, snow, and condensation conditions. The programmable functions are available
through a HART
® port used with an intrinsically safe (I.S.) handled unit.
The source and detector unit enclosures are ATEX and IECEx approved Exd flameproof with
an integral segregated rear and an Exe terminal compartment to prevent exposing the
sensors and electronics to the surrounding environment. The detector also has a plug
interface for connection to a HART Field Communicator, which is intrinsically safe.
This Manual provides a full description of the detector and its features and contains
instructions on installing, operating, and maintaining the detector.
TheRosemount 936 detects and monitors toxic gases, such as NH
3
and H
2
S at ppm.m
concentrations in the air. The detector's response time is no more than ten seconds to
T90.
The open path system uses an open path beam of flash light pulses that provide a long line
of sight coverage equivalent to many point detectors along the path. The transmitter
beam covers a UV spectrum from 200 nm to 300 nm. The detector continuously monitors
for gas through the collimated beam over an optical path from 17 ft. (5 m) up to 200 ft.
(60 m).
Reference Manual Product overview
00809-0100-4036 October 2021
Rosemount 936 7