Tongdy
MSD-1818C
Wall Mount Air Quality Monitor
Continuously track key pollutants and environmental factors with a commercial-grade monitor built for accuracy, stability and Green Building compliance.
Note: All Tongdy monitors and controls ship direct from the factory. Please allow 10-15 business days for shipping and handling.
This wall mount air quality monitor detects PM2.5, PM10, CO2, VOC, temperature and relative humidity, providing comprehensive environmental data. Its 3-color backlight LED ring offers clear visual status indicators for quick assessment.
Equipped with a Modbus RS485 interface and compatible with 24VAC/VDC power supplies, it ensures reliable integration into industrial or commercial systems. Certified for RESET standards, this device guarantees trusted performance and accuracy in monitoring indoor air quality.
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24/7 real-time indoor air quality monitoring with data upload
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Commercial-grade multi-sensor module in sealed cast aluminum housing for stability and anti-interference
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Built-in constant-flow blower ensures long-term accuracy, reliability, and low maintenance
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Monitors PM2.5, PM10, CO2, TVOC, HCHO, temperature and humidity
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Patented technology reduces influence of ambient temperature and humidity
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Dual power supply options: 24VDC/VAC or 100–240VAC
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Flexible communications: RS485 Modbus, WiFi, RJ45 Ethernet (extra RS485 for setup/checking)
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Three-color light ring indicates indoor air quality levels (can be switched off)
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Ceiling or wall mounting with sleek, modern design for any décor
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RESET Grade B certified for Green Building standards compliance
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Backed by 15+ years of IAQ expertise and proven global market performance
General Data
| Detection Parameters(max.) | PM2.5/PM10, CO2, TVOC, Temperature & RH, HCHO |
| Output (Optional) | RS485 (Modbus RTU or BACnet MSTP). RJ45/TCP (Ethernet) with an extra RS485 interface. WiFi @2.4 GHz 802.11b/g/n with an extra RS485 interface |
| Operating Environment | Temperature: 0~50 ℃ (32 ~122℉)Humidity: 0~90%RH |
| Storage Conditions | -10~50 ℃ (14 ~122℉)/0~90%RH (No condensation) |
| Power Supply | 12~28VDC/18~27VAC or 100~240VAC |
| Overall Dimension | 130mm(L)×130mm(W)×45mm (H) 7.70in(L)×6.10in(W)×2.40in(H) |
| Power consumption | Average 1.9w (24V) 4.5w( 230V) |
| Material of Shell & IP Level | PC/ABS fire-proof material / IP20 |
| Certification Standard | CE, FCC, ICES |
PM2.5/PM10 Data
| Sensor | Laser particle sensor, light scattering method |
| Measuring Range | PM2.5: 0~500μg/m3 PM10: 0~800μg/m3 |
| Output Resolution | 0.1μg /m3 |
| Zero Point Stability | ±3μg /m3 |
| Accuracy （PM2.5） | 10% of reading (0~300μg/m3@25℃ , 10%~60%RH) |
CO2 Data
| Sensor | Non-Dispersive Infrared Detector (NDIR) |
| Measuring Range | 0～5,000ppm |
| Output Resolution | 1ppm |
| Accuracy | ±50ppm +3% of the reading (25 ℃, 10%~60%RH) |
Temperature and Humidity Data
| Sensor | High precision digital integrated temperature and humidity sensor |
| Measuring Range | Temperature︰-20~60 ℃ (-4~140℉) Humidity︰0~99%RH |
| Output Resolution | Temperature︰0.01 ℃ (32.01 ℉) Humidity︰0.01%RH |
| Accuracy | Temperature︰<±0.6℃ @25℃ (77 ℉) Humidity︰<±4.0%RH (20%~80%RH) |
TVOC Data
| Sensor | Metal oxide gas sensor |
| Measuring Range | 0~3.5mg/m3 |
| Output Resolution | 0.001mg/m3 |
| Accuracy | ±0.05mg+10% of reading (0~2mg/m3 @25℃, 10%~60%RH) |
HCHO Data
| Sensor | Electrochemical formaldehyde sensor |
| Measuring Range | 0~0.6mg/m3 |
| Output Resolution | 0.001mg∕㎥ |
| Accuracy | ±0.005mg/㎥+5% of reading (25℃, 10%~60%RH) |
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