CHP1 Pyrheliometer
The CHP1 is a Kipp & Zonen pyrheliometer for direct normal irradiance (DNI) measurement, meeting First Class ISO/WMO performance criteria and typically paired with a sun tracker.
- Output
- 7 to 14 µV/W/m²
- Spectral range (50% points)
- 200 to 4000 nm
- Response time
- < 5 s
Overview
In detail
How it works
The CHP1 measures the direct beam of solar radiation across a narrow 5° field of view, so it must be mounted on a sun-tracking device such as the SOLYS2 to stay accurately pointed at the sun. A quartz window covers the full solar spectrum from 200 to 4000 nm.
What's included
Every unit is calibrated on manufacture and supplied with a WRR-traceable calibration certificate, plus a 10 kΩ thermistor and a Pt-100 temperature sensor fitted as standard, allowing small temperature-dependent sensitivity errors to be corrected in post-processing.
Deployment
A screw-in drying cartridge protects the components from moisture and can be removed quickly for a fast desiccant changeover. A high-quality connector keeps installation and maintenance simple.
Reach out and say hi
Let us help. Tell us the site, the range you expect and what it has to talk to, and we’ll work out the right variant, cable and mounting — and quote it.
Specifications
Technical specifications
- Spectral range (50% points)
- 200 to 4000 nm
- Output
- 7 to 14 µV/W/m²
- Response time
- < 5 s
- Zero offset B
- < 1 W/m²
- Temperature dependence of sensitivity (-20 to +50 °C)
- < 0.5 %
- Field of view
- 5 ±0.2°
- Operating temperature
- -40 to +80 °C
- Non-linearity
- < 0.2 %
- Maximum solar irradiance
- 4000 W/m²
- International standard (ISO)
- First Class
Related
Often specified alongside
Weathertech
SP Lite2 Pyranometer
- Temp
- -40 °C to +80 °C
- Spectral range (overall)
- 400 to 1100 nm
- Sensitivity
- 60 to 100 µV/W/m²
SMP21Weathertech
SMP21 Secondary Standard Pyranometer
- Temp
- -40 °C to +80 °C
Ready to specify?
Add the CHP1 to your enquiry
Build a list, add your site notes, and an ESS engineer will quote the lot — cables, mounting and calibration included.
