Parameter Sensor Measuring range Resolution Accuracy*
T
90
response
time
O
2 Electro-chemical From 0 % to 21% 0.1 % vol. ±0.2 % vol. 30 s
CO Electro-chemical from 0 to 8000 ppm 1 ppm From 0 to 200 ppm: ±10 ppm
From 201 to 2000 ppm: ±5 % of measured value
From 2001 to 8000 ppm: ±10 % of measured value
30 s
CO
2 Calculated** From 0 % to 99 % vol. 0.1 % vol. a a
Flue gas temperature K thermocouple from -100 to +1250 °C 0.1 °C ±0.4 % of measured value or ±1.1 °C 45 s
Ambient temperature Internal NTC From -20 to +120 °C 0.1 °C ±0.5 °C s
Differential pressure
Draft
Semiconductor From -20 000 to +20 000 Pa 1 Pa From -20 000 to -751 Pa: ±0.5 % of measured value ±4.5 Pa
From 750 to -61 Pa: ±0.9 % of measured value ±1.5 Pa
From -60 to 60 Pa: ±2 Pa
From 61 to 750 Pa: ±0.9 % of measured value ±1.5 Pa
From 751 to 20 000 Pa: ±0.5 % of measured value ±4.5 Pa
Losses Calculated** From 0 to 100 % 0.1 % a
Excess air (λ) Calculated** From 1 to 9.99 0.01 s
Lower efficiency (ηs) Calculated** From 0 to 100 % 0.1 % a
Higher efficiency (ηt)
(condensing)
Calculated** From 0 to 120 % 0.1 %