Apogee PAR-FAR Sensor

$498.00$598.00

Please select an option below:

S2-141-SS Analog Sensor

S2-441-SS SDI-12 Sensor

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Description

Unique two-band sensor for measuring both the PAR (PPFD) and Far-red outputs of electric grow lights

The new Apogee PAR-FAR sensor is a research-grade tool for 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.

Spectral Response

The PAR-FAR sensor has a spectral range of 389 to 692 nm ± 5 nm (PAR) and 702 to 761 nm ± 5 nm (Far-red). The spectral responses can be seen in the graph below.

Graph showing the spectral responses of the PAR-FAR sensor (spectral range of 389 to 692 nm ± 5 nm (PAR) and 702 to 761 nm &plusm; 5 nm (Far-red)).

Rugged, Self-cleaning Housing

The patented domed shaped sensor head (diffuser and body) facilitates runoff of dew and rain to keep the sensor clean and minimizes errors caused by dust blocking the radiation path. Sensors are housed in a rugged, anodized aluminum body and electronics are fully-potted.

Typical Applications

Applications include monitoring plant light environments, researching plant morphogenic activity, and photobiology studies.
Mounting

The AL-120 Solar Mounting Bracket with Leveling Plate facilitates mounting the sensor to a mast or pipe. The AL-100 Solar Sensor Leveling Plate is designed to level the sensor while sitting on a flat surface or mounting to a surface.

Output Options

Available in digital SDI-12 output or with an analog output.

High Quality Cable

Pigtail-lead sensors feature an IP68, marine-grade stainless-steel cable connectors built directly into the sensor head to simplify sensor removal for maintenance and recalibration. Cable is shielded-twisted-pair wire with a TPR jacket for high water resistance, UV stability, and flexibility in cold conditions.

 

Specifications

S2-141-SS(Analog) S2-441-SS(SDI-12)
Power Supply Self-powered 5.5 to 24 V DC
Current Draw 1.4 mA (quiescent), 1.8 mA (active)
Output (Sensitivity) 0.01 mV per µmol m-2 s-1 (PAR)
0.02 mV per µmol m-2 s-1(Far-red)
Calibration Factor (reciprocal of sensitivity) 100 µmol m-2 s-1 per mv (PAR)
50 µmol m-2 s-1 per mv (Far-red)
Custom for each sensor and stored in firmware
Calibration Uncertainty ± 5 % ± 5 %
Output Range 0 to 40 mV (PAR)
0 to 20 mV (Far-red)
SDI-12
Measurement Repeatability Less than 1 % Less than 1 %
Long-term Drift Less than 2 % per year 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)
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 Less than 0.6 s
Field of View 180° 180°
Spectral Ranges 389 to 692 nm ± 5 nm (PAR)
702 to 761 nm ± 5 nm (Far-red)
389 to 692 nm ± 5 nm (PAR)
702 to 761 nm ± 5 nm (Far-red)
Directional (Cosine) Response ± 2 % at 45°; ± 5 % at 75° ± 2 % at 45°; ± 5 % at 75°
Temperature Response Less than 0.1 % per C Less than 0.1 % per C
Housing Anodized aluminum body with acrylic diffuser Anodized aluminum body with acrylic diffuser
IP Rating IP68 IP68
Operating Environment -40 to 70 C; 0 to 100 % relative humidity -40 to 70 C; 0 to 100 % relative humidity
Dimensions 30.5 mm diameter, 37 mm height 30.5 mm diameter, 37 mm height
Mass (with 5 m of cable) 140 g 140 g
Cable 5 m of shielded, twisted-pair wire with TPR jacket and stainless steel connector 5 m of shielded, twisted-pair wire with TPR jacket and stainless steel connector
Warranty 4 years against defects in materials and workmanship 4 years against defects in materials and workmanship

 

Warranty and Support

All Apogee products are backed by an industry-leading four year warranty and outstanding customer support

Additional information

Model

S2-141-SS, S2-441-SS