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 SupplySelf-powered5.5 to 24 V DC
Current Draw1.4 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 Range0 to 40 mV (PAR)
0 to 20 mV (Far-red)
SDI-12
Measurement RepeatabilityLess than 1 %Less than 1 %
Long-term DriftLess than 2 % per yearLess than 2 % per year
Non-linearityLess 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 TimeLess than 1 msLess than 0.6 s
Field of View180°180°
Spectral Ranges389 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 ResponseLess than 0.1 % per CLess than 0.1 % per C
HousingAnodized aluminum body with acrylic diffuserAnodized aluminum body with acrylic diffuser
IP RatingIP68IP68
Operating Environment-40 to 70 C; 0 to 100 % relative humidity-40 to 70 C; 0 to 100 % relative humidity
Dimensions30.5 mm diameter, 37 mm height30.5 mm diameter, 37 mm height
Mass (with 5 m of cable)140 g140 g
Cable5 m of shielded, twisted-pair wire with TPR jacket and stainless steel connector5 m of shielded, twisted-pair wire with TPR jacket and stainless steel connector
Warranty4 years against defects in materials and workmanship4 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