MSR ELECTRONIC PolyGard 2 MC2 - D: Infrared Sensor Element for Methane, Propane, Carbon Dioxide (and R32)

User Manual PolyGard
®
2 Sensors 2023-11 Page 33 | 40
D: Infrared Sensor Element for Methane, Propane, Carbon Dioxide (and R32)
Sensor Element SC2/MC2 Methane/Propane/Carbon Dioxide/R32 – Premium
SENSOR ELEMENT
Gas type and measuring range
See datasheet MC2/SC2_IR_Premium
Measuring principle
Infrared
Accuracy
± 5 %
Repeatability
< ± 2 % signal
Drift in air
< 0.25 % / month
Temperature range
-40 °C to +70 °C (-40 °F to 158 °F)
Humidity range
0–95 % RH (non-condensing)
Pressure range
70–130 kPa
Storage temperature range
1
-40 °C to +70 °C (-40 °F to 158 °F)
Storage time
2
Ca. 6 months
Life time
3
in air
> 10 years
Calibration interval
4
12 months
Poisoning
IR sensors can show signs of poisoning due to contamination with oils and lub-
ricants.
Gas type
Ordering No.
Measuring range
Display resolution
Plastic housing
Stainless steel housing (SC2)
Zero-point variation
Relative Gas density
5
t
90
time
Reaction time
t
90
time
Reaction time
SC2-/
MC2-X-
% / ppm
≤ sec.
≤ sec.
≤ sec.
≤ sec.
± % LEL
% vol
Air = 1
R32
I200-A
0-50 % LEL
0.01
80
5
210
10
2
1.82
CH
4
I400-A
0–100 % LEL
0.1
55
5
150
10
2
0.56
CH
4
I400-B
0–100 % vol
0.1
60
5
130
10
2
0.56
CO
2
I464-B
0–5 % vol
0.001
60
5
150
10
n.d.
1.53
CO
2
I464-C
0–2 % vol
0.001
60
5
150
10
n.d.
1.53
CO
2
I464-D
0–5000 ppm
1
75
5
150
10
n.d.
1.53
CO
2
I464-F
0–10 % vol
0.01
60
5
150
10
n.d.
1.53
C
3
H
8
I480-A
0–100 % LEL
0.1
100
5
230
10
2
1.55
1
A deviating storage temperature can have a negative effect on sensitivity and service life
2
If stocked for a longer period, we recommend checking the zero point and recalibrating if necessary.
3
Expected service life for normal ambient conditions
4
Manufacturer-recommended calibration intervals for normal environmental conditions.
5
The recommended mounting height depends on the relative gas density of the type of gas to be monitored. Depend-
ing on the relative gas density (d), the following recommendation therefore applies:
d ≤ 0.85: Mounting 0.3–0.5 m below the ceiling
0.85 < d < 1.15: Mounting at 1.2–1.8 m height
d ≥ 1.15: Mounting 0.3–0.5 m above the floor