- PTM-48A Photosynthesis Monitor
- PM-11 Phytomonitor
- Sensors for PTM-48A and PM-11
- Overview
- Plant Sensors
- Environmental Sensors
- Sensors for third party loggers
- Overview
- Plant Sensors
- Environmental Sensors

The TIR-4P Pyranometer measures total irradiance in Watts per square meter. The pyranometer includes a temperature compensated silicon detector equipped with the cosine-correcting head.
The spectral response of TIR-4P Pyranometer does not cover the full range of solar spectrum. Therefore, it should be used under the same conditions as at calibration. All TIR-4P sensors are calibrated against LI-200SA Pyranometer (LI-COR, USA) under natural, unobstructed daylight conditions.
Standard output cable length is 4 meters.
| Calibration | Natural sunlight, Against LI-200SA Pyranometer |
| Measurement range | 0 to 1000 W/m2 |
| Absolute accuracy | ±10% |
| Repeatability | ±1% |
| Dimensions, mm | 110 L × 20 ∅ |
| Mass without cable | 30 g |
| Output cable length | 4 m |