- Overview
- Specification
- Accessories
- Product Resources How to Buy
The QS6 – SDI-12 is a digital sensor that uses SDI-12 communication protocol.
The sensor features a rugged, self-cleaning sensor housing design, and high-quality cable with M-12 connector for easy connection to Delta-T Devices SDI-12 cable networks.
Typical applications include PPFD (Photosynthetic Photon Flux Density) measurement over plant canopies in outdoor environments, greenhouses, and growth chambers, and reflected or under-canopy (transmitted) PPFD measurements in the same environments.
Specification
| Input Voltage Requirement | 5.5 to 24 V DC |
| Current Draw | 1.4 mA (quiescent), 1.8 mA (active) |
| Calibration Uncertainty | ± 5 % |
| Measurement Repeatability | Less than 1 % |
| Long-term Drift (Non-stability) | Less than 2 % per year |
| Non-linearity | Less than 1 % (up to 2500 µmol mˉ² sˉ ¹) |
| Response Time | 0.6 s, time for detector signal to reach 95 % following a step change, fastest data transmission rate for SDI-12 circuitry is 1 s |
| Field of View | 180˚ |
| Spectral Range | 370 to 650 nm ( wavelengths where response is greater than 50 % of maximum) |
| Directional (Cosine) Response | ± 5 % at 75˚ zenith angle |
| Temperature Response | Less than 0.5 % from -20 to 50 C |
| Operating Environment | -20 to 60 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m |
| Dimensions | 30.5 mm diameter, 37 mm height |
| Mass (with 5 m of cable) | 140 g |
