ES-S228T-A Total solar radiation sensor (Class A)

The ES-S228T-A series total radiation sensor is a shortwave total radiation sensor used for solar radiation observation. It is a Class A total radiation sensor conforming to the latest ISO 9060 and WMO technical standards. It measures solar radiation received by a horizontal plane from a solid angle of 2 T steradian degrees (hemispherical), with units of W/m’.

The ES-S228T-A series total radiation sensor is a shortwave total radiation sensor used for solar radiation observation. It is a Class A total radiation sensor conforming to the latest ISO 9060 and WMO technical standards. It measures solar radiation received by a horizontal plane from a solid angle of 2 T steradian degrees (hemispherical), with units of W/m’.

The ES-S228T-A series total radiation sensor operates in a completely passive mode, utilizing a thermopile sensor to generate an output voltage proportional to the incident radiation flux. Due to the use of two spherical glass domes, measurement errors, especially thermal offset, are reduced, resulting in high measurement accuracy.

Classified according to ISO 9060/WMO standards

Grade A/Good Quality

Response time (95% response)

<5s

Zero-point offset: Corresponding to 200 W/m² net thermal radiation (ventilation)

<7 W/m²

Stability (Variation/Year, Percentage of Full Scale)

±0.5%

비선형성

±0.2%(100~1000 W/m²)

Directional Response

±10 W/m²

Temperature Response

<1%(-10~40℃)

Tilt Response

<0.5%

Sensitivity Range

7-14μV/(W/m²)

작동 온도

-40~+80℃

Internal Resistance

<50Ω

Standard Cable Length

3m

Measurement Range

0~4000W/m²

Cable Replacement

Users can remove and install cables

Spectral Range

280~3000 nm (50% transmittance)

Reading Requirements

One differential voltage channel or one single-ended voltage channel

Horizontal Calibration

Includes bubble level and adjusting feet

Solar Exposure Uncertainty

±1%

Weight (excluding cable)

0.8kg

Calibration Traceability

WRR traceability, procedure according to ISO9847

Recommended Calibration Cycle

Biennially

출력 신호

Original output 0~20mV,Optional RS485/4~20mA output (not for external transmitter)

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