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LPPAR03 Series – Radiometric Probe for Photons Flow
Brand: Delta OHM S.R.L.The probe LPPAR03 measures the ratio between the number of photons that strike a surface in one second, in the 400 nm to 700 nm spectral range and the surface area (m²).
This quantity is defined as PAR: Photo-synthetically Active Radiation.
The probe calibration is carried out by using an halogen lamp, with a known spectral irradiance in a specific spectral range. Temperature slightly affects the probe spectral response.
The probe is designed for outdoor readings. Output, according to the chosen configuration, in μV per μmol m-²s-¹ or 4 to 20 mA or 0 to 10 Vdc normalized output or RS485 MODBUS-RTU output.
- LPPAR03 = μV/(μmol m-²s-¹) output
- LPPAR03BL = μV/(μmol m-²s-¹) output + base with levelling device
- LPPAR03BLAC = output 4 to 20 mA + base with levelling device
- LPPAR03BLAV = output 0 to 10 V + base with levelling device
- LPPAR03BLS = RS485 MODBUS-RTU output + base with levelling device
Working temperature -20 to +60 °C. M12 male 4-pole (models with analog output) or 8-pole (model with RS485 MODBUS-RTU output) connector.
On request, CPM12AA4 (except LPPAR03BLS) or CPM12-8D (only LPPAR03BLS) cable with M12 female connector.
Specifications
Brand
Typical Sensitivity
- 1 to 2.5 μV/(μmol(m-2 s-1))
Typical Spectral Range
- 400 nm to 700 nm
Calibration Uncertainty
- < 5 %
f2 (Cosine Response)
- < 3 %
f3 (Linearity)
- < 1 %
Operating Temperature
- -20° C to +60° C
Impedance
- 0.5 to 1.0 kΩ non-normalized version
Version with Normalized Output 4 to 20 mA
- 20 mA = 5000 μmol(m-2 s-1)
- 4 mA = 0 μmol(m-2 s-1)
Version with Normalized Output 0…10 Vdc
- 10 V = 5000 μmol(m-2 s-1)
- 0 V = μmol(m-2 s-1)
Version with RS-485 MODBUS-RTU Output
- 0…5000 μmol(m-2 s-1)
Power Supply
- 10 to 30 Vdc for version with normalized output 4-20 mA
- 15 to 30 Vdc for version with normalized output 0 to 10 Vdc
- 5 to 30 Vdc for version with RS-485 Modbus-RTU output
