| Wohler A 400 PRO Technical Data |
| Oxygen (O2) |
| Sensor type |
electrochemical |
| Range |
0.0...21.0 Vol.-% |
| Resolution |
0.1 Vol.-% |
| Accuracy |
± 0.3 Vol.-% |
| Carbon monoxide (CO) |
| Sensor type |
electrochemical |
| Range |
0...4,000 ppm |
| Resolution |
1 Vol.-ppm |
| Accuracy |
± 5 % f.m., absolute ±20 ppm |
| Nitric oxide (NO) |
| Range |
0...1,000 ppm |
| Resolution |
1 Vol.-ppm |
| Accuracy |
± 5 % f.m., ± 5 Vol.-ppm (<100 ppm) |
| Draft / Differential Pressure (PD) |
| Unit |
inWC / psi / Pascal / mbar |
| Range |
± 40 inWC |
| Resolution |
0.004 inWC |
| Accuracy |
± 2 % f.m., absolute ± 0.020 inWC |
| Flue Gas Temperature (TS) |
| Unit |
°F / °C |
| Sensor type |
thermoelement (NiCr-Ni) |
| Range |
-4 °F...1,472 °F |
| Resolution |
0.2°F |
| Accuracy |
32...257 °F: ± 4 °F; 257...482 °F: ± 6 °F; 482...752 °F: ± 8 °F; 252...1472 °F: ± 1.5 % f. m. |
| Supply Air Temperature (TA) |
| Unit |
°F / °C |
| Sensor type |
emiconductor (Si-PTC-Ni) |
| Range |
-4 °F...248 °F |
| Resolution |
0.2 °F |
| Accuracy |
±2 °F |
| Calculated Values |
| Effc. / SL |
efficiency and losses calculated in accordance to ASME standards |
| ETA / QS |
efficiency and losses calculated in accordance to EN European standards |
| CO2 in Vol.-% |
range O – CO2max, resolution 0.1% |
| COc |
CO concentration (COcorrected) air free, adjustable O2 reference level |
| Dew point |
in °C/°F |
| λ / EA |
Lambda (theoretical air), Excess Air |
| mCOND |
condensate quantity in condensing conditions |
| Work temperature |
+41 °F...104 °F to meet specifications |
| Storage temperature |
-4 °F...122 °F |
| Battery lifetime |
AA batteries > 10 h (NiMH, 2000 mAh) |
| Weight |
1.4 lbs. |
| Size |
8" x 3.3" x 8.7" (without probe) |
| Length cable-hose |
67" |