ZNR Net Radiometer
ZNR
The ZNR is a net radiometer that measures net radiation, the balance between incoming and outgoing radiation, across a spectral range of 0.3-100 μm using a thermopile sensor, requiring no external power. It is supplied in the UK by MetSensor UK.
- ✓ Measures net radiation from -300 to +1000 W/m²
- ✓ Wide spectral range 0.3-100 μm
- ✓ No external power required, self-generating thermopile output
- ✓ Double-layer quartz glass cover and matt black wire-wound thermopile
- ✓ ±20 mV output signal, or RS485 (customizable)
- ✓ Annual stability ≤±2%
Specifications
| Spectral range | 0.3-100 μm |
|---|---|
| Signal range | -300 to +1000 W/m² |
| Output signal | -20 to +20 mV |
| Sensitivity | 5-14 μV/(W/m²) |
| Response time | ≤35 s (99%) |
| Internal resistance | 350 Ω |
| Annual stability | ≤±2% |
| Operating temperature | -40 to +50°C |
| Operating humidity | 0-100% RH |
| Housing diameter | Ø120 mm |
| Output interface | -20 to +20 mV / RS485 (customizable) |
| Power requirement | No external power required |
| Design features | Double-layer quartz glass cover; black conical absorber; wire-wound electroplated thermopile with matt black sensing surface |
| Environment Temperature | -40℃~+50℃ |
| Environment Humidity | 0%~100% RH |
| Chassis Diameter | Φ120mm |
| Interface | -20-20mV / RS485 |
Applications
- Agroforestry ecology
- Soil water evapotranspiration calculation
- Crop disaster prevention
- Building heat balance studies
Frequently asked questions
What does a net radiometer measure?+
The ZNR measures net radiation, the balance between total incoming solar and thermal radiation and total outgoing radiation from the surface, over a range of -300 to +1000 W/m².
Does the ZNR need an external power supply?+
No, it generates its own output signal via a thermopile and does not require external power.
What spectral range does the ZNR cover?+
0.3-100 μm, covering both shortwave solar and longwave thermal radiation.
What is the housing size?+
Ø120 mm diameter.
