Overview • 5
Overview
This operator’s manual describes the 35-3001A-08 combustible gas/carbon monoxide sample-
draw detector. This manual also describes how to install, start up, maintain, and calibrate the
sample-draw detector when using it with a gas monitoring controller. A parts list at the end of
this manual lists replacement parts and accessories for the sample-draw detector.
Specifications
Table 1 lists specifications for the combustible gas/carbon monoxide sample-draw detector.
See the controller Operator’s Manual for information specific to the controller.
Table 1: Specifications
Target Gases and Detection
Range
Combustible gas: 0 - 100% LEL
Carbon Monoxide: 0 - 300 ppm
Input Power
24 VDC Nominal (18.5 VDC - 30 VDC)
Construction (housing)
Fiberglass/polyester (NEMA 4X)
Dimensions
8.5 in. H x 6.5 in. W x 4.25 in. D
Weight
4.5 lbs.
Sampling Method
Sample-draw
Sample Flow
3.0 SCFH typical, with no inlet or exhaust line
Flow to Sensor
1.0 SCFH (nominal)
Low Flow Setpoint
0.6 ± 0.1 SCFH
Maximum Recommended Inlet/
Exhaust Line Length for
1/4” O.D. x 1/8” I.D. Tubing
Inlet
Exhaust
50 feet
0 feet
* RKI Instruments, Inc. does not recommend installing this
tubing size on both the inlet and exhaust.
Maximum Recommended Inlet/
Exhaust Line Length for
1/4” O.D. x 0.170” I.D. Tubing
Inlet
Exhaust
50 feet
50 feet
75 feet
0 feet
Response Time
90% in 30 seconds
Accuracy
Combustible Gas:
± 5% of reading or ± 2% LEL (whichever is greater)
Carbon Monoxide:
± 5% of reading or ± 5 ppm CO (whichever is greater)
