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Operating Manual
www.qedenv.com
SEM5000.002
© QED Environmental Systems Inc.
SEM5000 Surface Emissions Monitor
INSTRUMENT SPECIFICATIONS
The SEM5000 uses an internal membrane pump. The typical flow is 0.8 l/m. The minimum
flow is 0.6 l/m. The maximum flow is 1 l/m.
The use of accessories, such as the probe, can slightly reduce this flow. It is advised to only
use the parts and accessories supplied by QED.
The gas sample entrance connector has a size of D2 X D4 mm.
A hydrophobic internal filter protects the device against any entrance of dust or water. It is
strongly advised to use an external dust filter in order to avoid the accumulation of dirt in the
internal filter.
NOTE: The water trap filter is not designed to protect against chemicals.
Target gas
Methane
Measurement ranges
1-10000ppm
0.1% - 100% v/v (option)
Sensitivity
1ppm
Threshold of sensitivity
0.3ppm
Accuracy
+/-0.7ppm for [1 ; 10ppm]
+/-10% relative up to 10000
Response time
T90 = 2.5 seconds
T90 = 3.5 seconds with probe
Environmental
working
conditions
Humidity : from 5% to 80% relative humidity
Temperature : -25°C to +50°C
In a non-condensing atmosphere
Pressure : Atmospheric pressure 1013mb ±100mb
Power supply
Specific Li ion rechargeable battery pack
3,7V – 4000mA/h
Recharging duration: 4 hours 30 min
The aspiration of water or impurities may cause malfunction of the pneumatic
circuits and in some cases may damage the sensors.
