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Enabling better global research outcomes in soil, plant & environmental monitoring.

ER08-S & ER08-SE Pyranometer

The Middleton Solar ER08-S exceeds the ISO 9060 specifications for a Very High Quality Secondary Standard Pyranometer.

The ER08-S features an innovative new design or detector to give very low zero offset and fast thermopile response. The ER08-SE version has an inbuilt amplifier with a millivolt output for easy signal measurement.

Viewing Angle: 2π steradians
Irradiance: 0 – 4000 W/m2
Spectral Range: 295 – 3000nm (50% points)
Sensitivity (Typical): ER08-S: 7 uV/W.m-2; ER08-SE: 1 mV/W.m-2
Achievable Resolution: 0.1 W.m-2
Expected Output Signal (0 – 1500 W/m2) ER08-S: 0 to 15mV; ER08-SE: 0 to 1.5V
Initial Calibration Uncertainty (k=2): < ± 1.5% (traceable to WRR)
Achievable Daily Uncertainty: 2% (95% confidence level)
Output Impedance (nominal): ER08-S: 6kΩ; ER08-SE: 65Ω
Measurement Input Impedance: > 10MΩ recommended for ER08-S
Power Requirement: ER08-S: none; ER08-SE: 5 – 15 VDC, < 6 mA
Operating Temperature: -40 to +80°C
Operating Humidity: 0-100% RH
Bubble Level Resolution: 0.1°
Level Adjustment: one fixed foot, two adjustable feet
Detector Type: thermopile
Dome Window: ground from solid optical glass blank; Schott N-BK10
Body Construction: anodised marine-grade aluminium
Shade Disk: powdercoated aluminium
Fasteners & Feet: stainless steel
Dessicant: orange silica gel (non-toxic)
IP Rating: sealed to IP67
Mounting Method: central M10 hole in base (mounting knob supplied), or two M4 holes on 65mm P.C.D
Output Lead: 6m, with connector at instrument end
User’s Guide & Calibration Certificate: Included
Net Weight: 0.8kg
Shipping Size & Weight: 230 x 230 x 180mm, 2kg

ER08-S Schematic

New design: Integrating Cavity Pyranometer.

Reduced measurement uncertainty – hidden offsets are insignificant.

Suitable for all precision Meteorological and Industrial applications.

Very fast response time is ideal for solar Photovoltaic Power Plant monitoring.

Single glass dome gives lower directional error than conventional double dome configuration.

Performance Specification ISO 9060 Secondary Standard ER08-S and ER08-SE
Response Time (to 95%) < 15 sec 0.3 sec
Zero offsets
A) Thermal Radiation (200 W.m-2)
B) Temperature Change (5K/hour)
(ventilated)
+ 7 W.m-2
(ventilated or unventilated)
< ± 0.2 W.m-2
±2 W.m-2 < ± 0.2 W.m-2
Non-stability (per year) ± 0.8% < 0.1%
Non-linearity (100-1000 W.m-2) ± 0.5% < ± 0.2%
Directional Response (1000 W.m-2) ±10 W.m-2 (30-80°) < ± 10 W.m-2 (0-80°)
Spectral Selectivity (0.35 to 1.5 um) ± 3% < ± 3%
Temperature Response (for 50K interval) ± 2% < ± 1% (-20 to +60°C)
Tilt Response (0-90°) ± 0.5% < 0.2%