Emerson Rosemount 935 Reference Manual page 14

Open path combustible gas detector

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Table of Contents

Technical description

May 2022

Figure 2-1: Flash source

A. Front window section

B. Label

C. Main housing

D. Mounting plate

E. Junction box

F. Back cover

G. Indication light-emitting diode (LED)

H. Earth terminal

I. Cable inlets

J. Front window

2.5.2

Detector unit

The detector receives the transmitted pulsed radiation signals from the source. The signals

are then amplified and fed into an analog to digital signal converter to be processed by the

internal microprocessor.

When the signals drop below a prescribed level, the internal microprocessor compensates

for them. This allows the signals to be maintained even in severe weather conditions. The

data is sent to the output interface section.

The front window of the detector is heated to improve performance in icing,

condensation, and snow conditions.

There is one detector type that is suitable for all models

Reference Manual

00809-0100-4035

Emerson.com/Rosemount

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