PAR-FAR Sensor
The S2-141-SS PAR-FAR sensor is a unique two-channel sensor for measuring both the PAR (PPFD) and Far-red outputs of electric grow lights and is self-powered. The sensor features a rugged, aluminum housing that is fully-submersible and built to withstand harsh conditions, and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. The sensor cable includes an IP68 marine-grade stainless-steel cable connector to simplify sensor removal and replacement from permanent installations for maintenance and calibration.
- Power Supply: Self-powered
- Output (sensitivity) [varies per sensor]: 0.01 mV per µmol m⁻² s⁻¹ (PAR); 0.03 mV per µmol m⁻² s⁻¹ (Far-Red)
- Calibration Factor (reciprocal of sensitivity) [varies per sensor]: 100 µmol m⁻² s⁻¹ per mV (PAR); 38 µmol m⁻² s⁻¹ per mV (Far-Red)
- Calibration Uncertainty: ± 5 %
- Output Range: 0 to 40 mV (PAR); 0 to 20 mV (Far-Red)
- Measurement Repeatability: Less than 1 %
- Long-term Drift: Less than 2 % per year
- Non-linearity: Less than 1 % (up to 4000 µmol m⁻² s⁻¹) (PAR); Less than 1 % (up to 1000 µmol m⁻² s⁻¹) (Far-Red)
- Response Time: Less than 1 ms
- Field of View: 180˚
- Spectral Ranges: 389 to 692 nm ± 5 nm (PAR); 700 to 750 nm ± 5 (Far-Red)
- Directional (Cosine) Response: ± 2 % at 45˚; ± 5 % at 75˚ zenith angle
- Temperature Response: Less than 0.1 % per C
- Housing: Anodized aluminum body with acrylic diffuse
- IP Rating: IP68
- Operating Environment: -40 to 70 C; 0 to 100 % relative humidity
- Dimensions: 30.5 mm diameter, 37 mm height
- Mass (with 5 m of cable): 140 g
- Cable: 5 m of shielded, twisted-pair wire; TPR jacket (high water resistance, high UV stability, flexibility in cold conditions); pigtail lead wires; stainless steel (316), M8 connector Warranty: 4 years against defects in materials and workmanship. Manufactured: Assembled in the USA