2 • Sample Draw Combustible Gas Detector
Description
This section describes the components of the sample draw combustible gas detector. The
sample draw detector consists of the housing, flow system, and detection system.
Figure 1: Sample draw Combustible Gas Detector Component Location
Housing
The sample draw detector’s fiberglass housing is weather- and corrosion-resistant. It is
suitable for installation where general purpose equipment is in use.
The housing door is hinged on the left side and is secured by two latches on the right side.
The flowmeter and status lights are visible through a window in the housing door.
Four mounting feet are attached to the back of the housing (one at each corner). Use the
mounting feet to install the housing to a vertical surface. Use the two conduit hubs on the
bottom of the housing to make wiring connections.
An aluminum subpanel is mounted to the interior of the housing. The sample draw
detector’s internal components are mounted to the subpanel.
Flow Alarm Se tpo int
Adjustment Po ten tiomet er
Externa l Wiring
Terminal Strip
In le t
Se nso r Wiring
Terminal St rip
Exh aust
Terminal Block
3/4" C on du it
Hub, 2X
Flowmeter
Particle filter
Byp ass valve
LE L Transmitter
Pu mp /flo w sw itch
termina l block
Flow Adjust
Potentiometer
Fail LE D
Pilot LE D
TP
+
TP
ZERO
SPAN
GND
24V
4-20
RED
WHT
GRN
BLK
POWER/SIG
SENSOR
P/N 57-1050RK
REV. 0
Factory Se t Pots
LEL
sensor
Zero Pot
Span Pot
JUMPER PI NS FOR
FACTORY U SE ONLY
Test Po ints
10 0 - 500 mV range
Mounting
Foot, 4X
