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SQ-614-SS 400-750 nm 4-20 mA output ePAR Sensor

Updated:2025-03-13

Brand: Apogee
Model: SQ-614-SS
Description: Apogee's newest, cutting-edge ePAR sensor was created in 2021 as an upgrade to our ePFD sensor and designed to measure the newly defined 400-750 nm ePAR radiation range that research has shown to be..
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Product Details

Overview of SQ-614-SS 400-750 nm 4-20 mA output ePAR Sensor：

User's Manual

Apogee's newest, cutting-edge ePAR sensor was created in 2021 as an upgrade to our ePFD sensor and designed to measure the newly defined 400-750 nm ePAR radiation range that research has shown to be photosynthetically active, beyond the traditional 400-700 nm range. The SQ-614 ePAR is an amplified sensor with a 4 to 20 mA output. 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 ePAR sensors include measuring total ePAR intensity over plant canopies in all growing environments, monitoring and adjusting grow lights, and researching plant morphogenic activity and photobiology. Many next generation LED fixtures, the sun, and other light sources emit these newly confirmed Far-red photosynthetic wavelengths, but they have not been measurable by traditional 400-700 nm PAR meters until now.

SQ-614-SS Sensor Drawing：

Specifications of SQ-614-SS:

Power Supply	12 to 24 V DC
Current Draw	Maximum of 20 mA
Sensitivity	0.004 mA per μmol mˉ2 sˉ1
Calibration Factor	250 μmol mˉ2 sˉ1 per mA
Calibration Uncertainty	± 5 %
Output Range	4 to 20 mA
Measurement Range	0 to 4000 μmol mˉ2 sˉ1
Measurement Repeatability	Less than 0.5 %
Long-term Drift (Non-stability)	Less than 2 % per year
Non-linearity	Less than 1 % (up to 4000 μmol mˉ2 sˉ1)
Response Time	Less than 1 ms
Field of View	180?
Spectral Range	400 to 750 nm ± 5 nm (wavelengths where response is greater than 50 %)
Directional (Cosine) Response	± 2 % at 45°; ± 5 % at 75°
Azimuth Error	Less than 0.5 %
Tilt Error	Less than 0.5 %
Temperature Response	-0.11 ± 0.04 % per C
Uncertainty in Daily Total	Less than 5 %
Housing	Anodized aluminum body with acrylic diffuser
IP Rating	IP68
Operating Environment	-40 to 70 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)	140g
Cable	5 m of two conductor, shielded, twisted-pair wire; TPR jacket; pigtail lead wires; stainless steel (316), M8 connector
Warranty	4 years against defects in materials and workmanship
Manufactured	Made in the USA