For safety check by wearing at construction sites and steel mills, safety of site for workers.
- Can be used continuously for 5000 hours.
- 3 types of Alarm: loud buzzer, alarm lamp and vibration.
- Available with TWA (Time Weighted Average) concentration display, peak memory, and peak hold function.
| Model |
SDES-2200 |
| Gas Detected |
Oxygen (O2) |
Carbon Monoxide (CO) |
| Detection Principle |
Galvanic cell |
Electrochemical cell |
| Sampling Method |
Diffusion |
| Detection Range
(Service Range) |
0 to 25 vol%
(25-50vol%) |
0 to 300 ppm |
| Resolution |
0.1vol% |
0-300ppm: 1ppm
301-2,000ppm: 50ppm |
| Indication Accuracy*1 |
Within ±0.5vol% |
Within±30ppm |
| Alarm Set Value |
1st stage: 19.5vol%
2nd stage: 18.0vol% |
1st stage: 50ppm,
2nd stage: 150ppm,
150ppm ・ h (time weighted average) |
| Response Time*2 |
20s or less |
30s or less |
| Display Mode |
LCD (Manual backlight) |
| Alarm Mode |
Buzzer sounds, flashing red light, vibrator |
| Approvals |
Ex ib IIB T3 (TIIS) |
| Function |
Remaining battery level, peak hold, peak value memory, readout of time
weighted average, remainig battery level, alarm functions except gas
alarm (time weighted average, sensor malfunction, battery level,
zero-adjustment malfunction), gas calibration, gas concentration indication |
| Operation Temperature |
-10°C to +40°C, 30 to 90 %RH (non-condensing) |
| Operation Air Pressure |
Air pressure ±10% |
| Power Source |
1 x AAA alkaline dry cell |
| Battery Life*3 |
Up to 5,000 hours (at 20°C with less than 20ppm of CO and more than
20.3vol% of O2) |
| Dimensions |
W65 x H64 x D22mm (excluding protrusions) |
| Weight |
Approx. 75g (including batteries) |
| Standard Accessories |
1 x AAA alkaline dry cell, 1 x safety pin adaptor (with fixing screw) |
*1 Under identical measuring conditions.
*2 Operating at 20 ±2°C.
*3 Battery life may vary with ambient conditions, conditions of use, storage period, battery manufactures, etc.
oxygen【O2】, Carbon monoxide【CO】