Bio Instruments S.R.L.

Model PIR-1M - Quantum Sensor


The PIR-1M Quantum Sensor measures Photosynthetic Photon Flux (PPF) in µmol·m−2·s−1. The sensor is cosine-corrected, and has a domed diffusion disk and head for improved self-cleaning characteristics and long-term stability. The cosine error for typical applications is less than 2%. The output increases approximately 1% per year because of changes in the optical transparency of the diffusion disk. Quantum sensor is calibrated for sunlight. Average spectral errors associated with different light sources is shown on the right. The probe is connected by a standard 3-meter cable to the waterproof box with the signal conditioner inside. The output cable length should be specified in the order if required.

Calibration Natural sunlight
Measurement range 0 to 2500 µmol·m−2·s−1
PIR-1M 0 to 2 VDC, linear
PIR-1Mi 4 to 20 mA
Supply voltage 10 to 30 VDC
PIR-1M 0.5 W max
PIR-1Mi 1 W max
Absolute accuracy ±5%
Repeatability ±1%
Operating temperature 0 to 50 ℃
Protection index of sensor IP 67
Protection index of signal conditioner IP 64
Sensor dimensions, mm 24 ∅ × 27.5 H
Cable length between probe and signal conditioner 3  m

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