Specifications
16 
Environment 
This instrument complies with directive EN60601-1-2 
electromagnetic compatibility but can be affected by cellular phones 
and by electromagnetic interference exceeding levels specified in EN 
50082-1:1992 
Specifications 
Sensor type  Electro-chemical fuel cell 
Range  0 - 100 ppm 
Resolution  1 ppm 
Green indicator light  0 to 6ppm 
Amber indicator light  7 to 10ppm 
Red indicator light  11 to 20ppm 
Flashing red light  20+ 
Accuracy  +/-5% of reading or 1ppm whichever 
is the greater 
Sensitivity drift  0.5%/°C 
Sensor life  2 to 5 years 
Response time  < 15 sec (to 90% of reading) 
Hydrogen cross sensitivity  <15% 
Operating temperature  15 - 25 °C 
Operating pressure  Atmospheric +/- 10% 
Pressure coefficient  0.02% signal per mBar 
Relative humidity  15 - 90% continuous 
(Non condensing)  (0 - 99% intermittent) 
Baseline drift  0ppm (auto-zero) 
Long term drift  < 2% signal loss per month 
Power source  Single Alkaline 9 volt PP3 
Main battery life  30 hours of continuous use equivalent 
to approximately 2000 tests 
Internal battery life  10 years 
Weight  180 g (Including battery) 










