S2-141-SS PAR-FAR Sensor

$533.00

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. Typical applications of PAR-FAR sensors include measuring both the traditional PPFD photosynthetic photon flux and separately quantifying the photon flux of far-red photons (700-760 nm). The outputs include the traditional quantum flux, the far-red photon flux, and the far-red fraction (far-red photon flux density / sum of PPFD and far-red photon flux density). This sensor quantifies far-red photons, and for many applications it reduces the need for a more complex measurement with a spectroradiometer.

The analog version of this sensor (S2-141) comes with the inline cable connector placed 30 cm from the sensor head for either standard use as a long-cable pigtail sensor, or for use with our microCache Bluetooth Micro Logger by unscrewing the connector, discarding the long section of cable and then screwing the sensor to the mating connector on the microCache.

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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 diffuser 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