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VH400 Soil Moisture Sensor Probe Specifications Power consumption: < 13mA Supply Voltage: 3.5V to 20 VDC. Dimensions See drawing. Power on to Output stable: 400 ms Output Impedance: 10K ohms Operational Temperature: -40ºC to 85ºC Accuracy at 25°C: 2% Output: 0 to 3V related to moisture content Shell Color: Red Voltage Output Curves: Curves, Piecewise...
From Price €78.00
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SR25 Pyranometer
  • SR25 Pyranometer
  • SR25 Pyranometer
  • SR25 Pyranometer

SR25 Pyranometer

SR25

Spectrally flat Class A pyranometer with sapphire outer dome
SR25 takes solar radiation measurement to the next level. Using a sapphire outer dome, it has negligible zero offsets. SR25 is heated in order to suppress dew and frost deposition, maintaining its high measurement accuracy. When heating SR25, the data availability and accuracy are higher than when ventilating traditional pyranometers. In addition, SR25 needs very low power; it only consumes 1.5 W compared to the usual 10 W for ventilation. The low thermal offsets make SR25 very suitable for measuring diffuse radiation.

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Description

Measurand hemispherical solar radiation
ISO 9060:2018 classification spectrally flat Class A pyranometer
ISO 9060:1990 classification secondary standard pyranometer
IEC 61724-1:2021 compliance meets Class A PV monitoring system requirements
Application National Meteorological Networks,PV monitoring commercial and utility scale,meteorology / climatology,other
Heater yes
Output mV
Zero offset a 1 W/m² unventilated
Calibration traceability to WRR
Spectral range 285 to 3000 x 10⁻⁹ m
Sensitivity (nominal) 15 x 10⁻⁶ V/(W/m²)
Rated operating temperature range 40 to +80 °C
Temperature response <± 1 % (-10 to +40 °C) and <± 0.4 % (-30 to +50 °C) with correction in dataprocessing
Temperature response test of individual instrument report included
Directional response test of individual instrument report included to 95 °
Temperature sensor Pt100 or 10 kΩ thermistor
Heater 1.5 W at 12 VDC
Standard cable length 5 m
Version order codes SR25-T1, SR25-T2

Options
Longer cable, in multiples of 5 meters

Best data availability
By keeping the outer dome of the SR25 free from dew and frost with the help of the internal heater, data availability is greatly increased compared to traditional pyranometers, whether ventilated or not. The application photo shows the clear difference between the SR25 and an unheated pyranometer without a sapphire dome.

Best measurement accuracy
The SR25 measures solar radiation received by a flat surface, in W/m², from a field of view angle of 180°. The SR25 offers the best measurement accuracy: the specification limits of two main sources of measurement uncertainty have been greatly improved compared to competing pyranometers: “zero offset to” and temperature response.

SR25 design
The SR25 has a sapphire outer dome, a glass inner dome and an internal heater. It employs a state-of-the-art thermopile sensor with a black-coated surface and an anodized aluminum body. The connector, desiccant holder and sun shield attachment are very robust and designed for long-term use.

Suggested use

  • diffuse measurements
  • all situations where ventilated pyranometers are used
  • photovoltaic system performance monitoring
  • indoor photovoltaic testing with solar simulators
  • airborne measurements
  • diffuse measurements
  • dew environments
  • frost environments
Product Details
SR25
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