EKO Instruments · Solar radiation
Spectroradiometers and more instruments from EKO Instruments
Distributor for EKO Instruments in SwedenEKO Instruments also makes instruments for those who need to know more than the total solar radiation: spectroradiometers that show how the light is distributed over wavelengths, pyrgeometers for longwave radiation, a camera that tracks the clouds and sensors for UV and sunshine duration.
Spectroradiometers
Measure the spectrum of solar radiation. The calibration is traceable to NIST.
UV, visible and near infrared
MS-711N
A spectroradiometer for 300–1100 nm, built for outdoor measurement.
- Resolution better than 7 nm.
- Operating temperature −10 to +50 °C.
Direct radiation
MS-711N DNI
The MS-711N with a collimating tube, for the spectrum of direct solar radiation.
- Mounts on the STR-21G or STR-22G sun tracker.
- Field of view 5°.
Near infrared
MS-712 and MS-713
Spectroradiometers for 900–1700 nm and 900–2500 nm.
- Cooled detector.
- Protection IP65.
Systems
WISER I and WISER II
Two spectroradiometers measuring together.
- WISER I: 300–1700 nm.
- WISER II: 300–2500 nm.
When do you need the spectrum?
A pyranometer gives a single value for the whole solar spectrum. Solar cells use different wavelengths with different efficiency, so two days with the same radiation can give different amounts of electricity. A spectroradiometer shows how the light is distributed, and the difference can be explained.
The MS-711N DNI mounts on a sun tracker and measures the spectrum of direct radiation. The WISER systems can be used on the STR-32G sun tracker.
Longwave radiation, clouds, UV and sunshine duration
Instruments that often complement the pyranometers at a radiation station.
Pyrgeometer
MS-21SH
A digital pyrgeometer with window heating, for longwave radiation over 4.5–42 µm.
- Modbus RTU and SDI-12.
- The MS-21 is the analogue model.
Pyrgeometer
MS-20SH
A simpler digital pyrgeometer with window heating.
- Modbus RTU and SDI-12.
- The MS-20 is the analogue model.
All-sky imager
ASI-16
Photographs the whole sky with a fisheye lens and calculates cloud cover, cloud type and cloud motion.
- Built-in ventilation and heating.
- Powered over the network cable.
Sunshine duration
MS-95S
A sunshine duration sensor with no moving parts.
- Modbus RTU, 4–20 mA or 0–1 V.
- According to EKO it needs no calibration.
UV
MS-10S and MS-11S
Radiometers for UV-A, 315–400 nm, and UV-B, 280–315 nm.
- Modbus RTU, 4–20 mA or 0–1 V.
Solar panels
PV-PT-100
A temperature sensor for solar panels.
- Class A Pt100.
What we do
Choice and quote
We help you choose class, output and set-up and send you a quote.
Wiring
The sensors are connected to a Campbell Scientific data logger or directly to your system.
Installation
Mounting, levelling and alignment on site, and a check that the data arrives.
Service and calibration
Cleaning and checks under a service agreement, and help when the sensors are due for recalibration.
Frequently asked questions
What is the difference between a pyranometer and a pyrgeometer?
A pyranometer measures shortwave radiation from the sun. A pyrgeometer measures longwave thermal radiation from the atmosphere and the ground. Together they give the radiation balance.
Can the spectroradiometer measure direct radiation?
Yes. The MS-711N DNI mounts on a sun tracker and measures the spectrum of direct radiation.
Do the instruments cope with winter?
The pyrgeometers, UV sensors and the sunshine duration sensor are made for −40 to +80 °C. The MS-711N spectroradiometer is made for −10 to +50 °C, so for cold sites we go through the conditions with you.
How are the instruments connected?
The pyrgeometers, UV sensors and sunshine duration sensor have Modbus RTU and connect to a data logger. The spectroradiometers connect serially and the all-sky imager to a network.
More from EKO Instruments
Would you like to know more about the instruments?
Tell us what you want to measure, and we will suggest instruments and set-up.