61-1020/61-0230 Molecular Property Spectrometer
Overview
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5
Overview
This manual describes the 61-1020 combustible gas detector. This manual also describes how to
install, start up, maintain, and calibrate the detector when used with a gas monitoring controller. A
parts list at the end of this manual lists replacement parts and accessories for the combustible gas
detector.
The 61-1020 combustible gas detector includes a junction box. This manual may also be used for
the 61-0230 combustible gas detector which does not include a junction box and is normally
mounted in one of a controller’s conduit hubs. If you are using a 61-0230 combustible gas
detector, disregard all references to the junction box and junction box terminal block.
Specifications
Table 1 specifies the detection range and accuracy for the 14 gases that the MPS sensor can
reliably detect at the same time.
Table 1: Detection Ranges and Accuracy
Target Gas
Formula
Detection Range
Accuracy
(0 to 50% LEL)
Butane
C
4
H
10
0 - 100% LEL
± 5% LEL
Ethane
C
2
H
6
0 - 100% LEL
± 5% LEL
Hydrogen
H
2
0 - 100% LEL
± 5% LEL
Isobutane HC(CH
3
)
3
0 - 100% LEL
± 5% LEL
Isobutylene C
4
H
8
0 - 100% LEL
± 5% LEL
Isopropanol
C
3
H
8
O
0 - 100% LEL
± 10% LEL
Methane
CH
4
0 - 100% LEL
± 3% LEL
Methyl Ethyl Ketone
C
4
H
8
O
0 - 100% LEL
± 5% LEL
Octane
C
8
H
18
0 - 100% LEL
± 5% LEL
Pentane
C
5
H
12
0 - 100% LEL
± 5% LEL
Propane
C
3
H
8
0 - 100% LEL
± 6% LEL
Propylene
C
3
H
6
0 - 100% LEL
± 5% LEL
Toluene
C
7
H
8
0 - 100% LEL
± 12% LEL
Xylene
C
8
H
10
0 - 100% LEL
± 12% LEL
NOTE:
The MPS sensor will respond to other combustible gases, but the accuracy has only
been determined for these 14 gases.