Sensor Cross Sensitivity Chart
Sensit Gold, Sensit Gold CGI, and Sensit HXG-3

Gas or Vapor
Formula
Sensitivity
(PPM)
100
LEL %
Reading
@ 10% LEL
Butane
(CH3) 3CH
25
2
3%
Hydrogen
H2
50
4
8%
MEK
CH3COCH2CH3
100
1.8
0.6%
Methane
CH4
10
5
10%
Methanol
CH3OH
50
6
2.5%
N-Hexane
CH3(CH2)4CH3
400
1.2
0.2%
Pentane
C5H12
25
2.5
5%
Propane
C3H8
10
2.2
6%
R-22
CHCLF2
50
N/A
N/A
R-507
R125 + R143A
100
N/A
N/A
R-410A
R32 + R125
100
N/A
N/A
NOTE 1: Readings may vary based on sensor age and condition.
NOTE 2: Readings relative to Methane calibration.

Gas-Trac Relative Sensitivity Chart (Including Limits of Flammability)

Gas or Vapor

Indicator Response Levels
Limits of Flammability
or Gases and Vapor
% In Air **
Audible
Visual - LED
Tick Rate
(PPM) *
First Amber
(PPM)
Red
(%)
Lower
Upper
Acetylene
10
750
2.0
2.5
81
Ammonia
10
1,000
1.0
15.5
26.6
Butane
10
850
0.8
1.9
8.5
Carbon Monoxide
50
20,000
---
12.5
74
Chlorine
---
---
---
---
---
Ethanol
10
750
0.4
4.7
19
Ethylene Oxide
5
500
0.3
3
100
Freon 12
100
1,500
---
---
---
Freon 22
10
500
0.07
---
---
Freon 502
5
250
0.2
---
---
Gasoline
10
900
0.5
1.5
7.5
Halon 1301
700
50,000
---
---
---
Hydrogen
5
250
0.3
4
75
Hydrogen Sulfide
1
50
0.05
4.3
45.5
Jet Fuel (JP-4)
350
0.1
1.16
6
75
Methane ***
10
1,000
2.0
5.3
14
Methanol
10
850
0.4
7.3
36
Methylene Chloride
10
600
0.2
---
---
Propane
10
750
0.8
2.2
9.5
Trichloroethylene
5
100
0.07
---
---
* This is the sensitivity level at which perceptible change in tick rate occurs.
** The data relating to limits of flamability represent the finding of the scientific community. All other data represents
the typical performance of the GAS•TRAC®.
*** Factory calibration setting.
NOTE: The above chart reflect the detector’s response when calibrated to specific methane standards.
As noted in ***