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LPRAD01 Radiometric Probe

Radiometric probe for indoor VIS-NIR irradiance measurement.

  • Measures irradiance from 0…200 mW/cm2 across ≈400 nm…≈1050 nm
  • Passive mV output, no external power supply
  • Individually calibrated, with a 5 m cable
Quantity
1

Overview

The Senseca LPRAD01 is a radiometric probe that measures irradiance, defined as the radiant energy flow (W) crossing a surface divided by the surface area (m2), in the VIS-NIR spectral region from ≈400 nm to ≈1050 nm. It is suitable for indoor applications that need constant radiometric monitoring, and it comes in a compact Ø 30 mm x 38 mm housing with a 5 m cable.

The probe needs no external power supply. The photodiode current is converted into a potential difference through a resistor, read in mV with a voltmeter, and the irradiance value is calculated with the calibration factor marked on the probe housing. Each probe is individually calibrated, using the 577/579 nm lines of a Xe-Hg lamp filtered through a special interferential filter. The output signal can also be converted to 4…20 mA or 0…10 Vdc using compatible HD978TR series converters.

Typical applications

  • Indoor VIS-NIR irradiance monitoring
  • Indoor applications that require constant radiometric monitoring

Key Features

  • VIS-NIR irradiance measurement, ≈400 nm…≈1050 nm
  • Measuring range 0…200 mW/cm2
  • Typical sensitivity 2.6 µV/µW/cm-2
  • Calibration accuracy <6%
  • Passive mV output, no external power supply needed
  • Individually calibrated, with the calibration factor marked on the housing
  • Compact Ø 30 mm x 38 mm housing with 5 m cable
  • Output convertible to 4…20 mA or 0…10 Vdc with HD978TR series converters

Benefits

  • Simple setup: passive mV output with no external power supply
  • Wide VIS-NIR coverage from ≈400 nm to ≈1050 nm for indoor irradiance monitoring
  • Each probe has its own calibration factor marked on the housing, for direct calculation of the measured value
  • Compact housing and 5 m cable make it easy to integrate into measurement setups

Specifications

MEASUREMENT

 

Measured quantity

Irradiance

Typical sensitivity

2.6 µV/µW/cm-2

Measuring range

0…200 mW/cm2

Spectral range

≈400 nm…≈1050 nm

 

 

ACCURACY

 

Calibration accuracy

<6%

Cosine response / directional error (f2)

<6%

Calibration method

577/579 nm lines of a Xe-Hg lamp, filtered through a special interferential filter

 

 

OUTPUT

 

Output signal

Passive mV signal from the photodiode with shunt resistor

Output impedance

1 kΩ

Signal conversion

Can be converted to 4…20 mA or 0…10 Vdc using HD978TR series converters

Reading instrument

Digital multimeter with input resistance >100 kΩ for 1% reading precision

 

 

POWER REQUIREMENT

 

Power supply

Not required (passive output)

 

 

ENVIRONMENTAL

 

Operating temperature

0…50°C

Application

Indoor use

 

 

MECHANICAL

 

Dimensions

Ø 30 mm x 38 mm height

Cable length

5 m

Downloads

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