Duct CO₂ sensor adalah sensor CO₂ tipe duct-mount yang digunakan untuk mendeteksi konsentrasi karbon dioksida (CO₂) di dalam saluran udara (duct). Produk ini digunakan dalam berbagai aplikasi seperti pemantauan konsentrasi CO₂ pada return duct, pengendalian pemasukan udara luar (outdoor air intake), dan lain sebagainya.
| Item | Specification |
|---|---|
| Power | 24 V AC +10%, -15% (at 50 Hz to 60 Hz) |
| Consumption power | Max. 3 VA |
| Output signal | 1 V DC to 5 V DC (Linear to 0–2000 ppm CO₂ concentration) |
| Allowable load resistance | Min. 5 kΩ |
| Measuring range | 0 ppm to 2000 ppm CO₂ concentration |
| Operating principle | Non-dispersive infrared (NDIR) |
| Accuracy | ±50 ppm ±5% of reading D/A conversion accuracy: ±2% of reading ±20 mV D/A resolution: 10 mV |
| Drift | Continuous ON: ±150 ppm/year (at 1000 ppm) Continuous OFF (reference): ±15 ppm/48 hours for 50 %RH |
| Time constant | 0.6 m/s air velocity, Max. 3 min |
| Environmental Conditions | |
| Operating conditions | CO₂ concentration: 0 ppm to 2000 ppm Temperature: 0°C to 50°C Humidity: 0 %RH to 85 %RH (non-condensing) |
| Wind velocity | More than 0.6 m/s |
| Transport/storage conditions | Temperature: -20°C to 50°C Humidity: 0 %RH to 95 %RH (in unopened package) |
| Vibration resistance | 4.9 m/s² (10 Hz to 150 Hz) |
| Insulation resistance | Min. 100 MΩ at 500 V DC (between case and each lead wire) |
| Dielectric strength | Max. 1 mA leakage current at 500 V AC for 1 minute |
| Protection class | IP65 (dust-proof and splash-proof) for the sensor |
| Materials | Sensor and rod: PC-ABS plastic Lid: PC plastic |
| Color | Sensor and rod: Black Lid: Transparent |
| Weight | Approximately 0.35 kg |
| Installation | Indoor duct chamber |
| Initial warm-up time | Continuously unpowered sensor for 48 hours or over: Approximately 10 days (Product which has just been unpacked is exceptional) Other than the above: Approximately 3 days |
| Wiring | Power: Two-wire CO₂ concentration output: Two-wire |
