Tongdy
PMD-1818C
In-Duct Mount Air Quality Monitor
Track particles, gases, temperature, and humidity directly in your air ducts with a durable, low-maintenance system designed for precise, continuous performance.
Note: All Tongdy monitors and controls ship direct from the factory. Please allow 10-15 business days for shipping and handling.
Its advanced sensors track PM2.5, PM10, CO2, TVOC, and optionally formaldehyde and CO, alongside temperature and humidity, ensuring comprehensive air quality assessment. Equipped with a large air-bearing fan, it maintains consistent airflow by automatically adjusting fan speed, promoting stability and device longevity. Remote monitoring and real-time diagnostics allow for accurate data correction throughout the device's lifecycle, guaranteeing dependable, continuous performance in demanding duct environments.
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Monitors PM2.5, PM10, CO2, TVOC, temperature and humidity (optional CO or formaldehyde)
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Stable, anti-interference design with patented sensor algorithm and cast aluminum housing
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Built-in fan and pitot tube system for constant airflow, long lifetime, and low maintenance
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Reusable filter mesh for easy cleaning and reduced upkeep costs
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Temperature/humidity compensation for more accurate readings
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Multiple communication options: WiFi, Ethernet, RS485 Modbus
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Integrates with indoor and outdoor monitors for complete air quality management
| Power Supply | 12~28VDC/18~27VAC or 100~240VAC?(optional) |
| Communication Interface | Choose one in the following |
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RS485/RTU£¬9600bps 8N1(default), 15KV Antistatic protection |
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MQTT protocol, Modbus customization or Modbus TCP optional |
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MQTT protocol, Modbus customization or Modbus TCP optional |
| Data upload interval cycle | Average / 60 seconds |
| Applicable air speed of duct | 2.0~15m/s |
| Working Condition | -20¡æ~60¡æ/ 0~99%RH, (No condensation) |
| Storage Condition | 0¡æ~50¡æ/ 10~60%RH |
| Overall Dimension | 180X125X65.5mm |
| Pitot tube size | 240mm |
| Net weight | 850g |
| Shell material | PC material |
| CO2 Data | |
| Sensor | Non-Dispersive Infrared Detector (NDIR) |
| Measuring Range | 0¡«2,000ppm |
| Output Resolution | 1ppm |
| Accuracy | ¡À50ppm + 3% of reading or ¡À75ppm ?(whichever is bigger) ?£¨25¡æ, 10%~80%RH£© |
| Particle?Data | |
| Sensor | Laser particle sensor |
| Measuring Range | PM2.5: 0~500¦Ìg/??£» PM10: 0~500¦Ìg/?£» |
| Output values | moving average/60 seconds, ?moving average/1 hour, ?moving average/24 hours |
| Output Resolution | 0.1¦Ìg/? |
| Zero Point Stability | <2.5¦Ìg/? |
| PM2.5?Accuracy (mean per hour) | <¡À5¦Ìg/?+10%?reading£¨0~300¦Ìg/??@10~30¡æ£¬10~60%RH£© |
| TVOC Data | |
| Sensor | Metal oxide sensor |
| Measuring Range | 0¡«3.5mg/m3 |
| Output Resolution | 0.001mg/m3 |
| Accuracy | <¡À0.05mg/m3+ 15% of reading£¨25¡æ, 10%~60%RH£© |
| Temp.& Humi.?Data | |
| Sensor | Band gap material temperature sensor¡¢Capacitive humidity sensor |
| Temperature range | -20¡æ~60¡æ |
| Relative humidity range | 0~99%RH |
| Output Resolution | Temperature: 0.01¡æ ???????humidity:0.01%RH |
| Accuracy | ¡À0.5¡æ£¬3.5%RH£¨25¡æ,?10%~60%RH£© |
| CO?Data?(option) | |
| Sensor | Electrochemical?CO sensor |
| Measuring Range | 0¡«100ppm |
| Output Resolution | 0.1ppm |
| Accuracy | ¡À1ppm+?5%?of reading£¨25¡æ,?10%~60%RH£© |
| OZONE?(option) | |
| Sensor | Electrochemical Ozone sensor |
| Measuring Range | 0~2000ug¨M??@20¡æ£¨0~2mg/m3£© |
| Output Resolution | 2ug¨M? |
| Accuracy | ¡À20ug/m3+?10%?of reading£¨25¡æ,?10%~60%RH£© |
| HCHO Data?(option) | |
| Sensor | Electrochemical Formaldehyde sensor |
| Measuring Range | 0~0.6mg¨M? |
| Output Resolution | 0.001mg¨M? |
| Accuracy | ¡À0.005mg/?+5% of reading??(25¡æ, 10%~60%RH) |
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In-Duct Mount Air Quality Monitor Datasheet
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