CH1020 Light Transmittance Meter, VLT, UV, IR, SHGC

COLO.Science · Spectroscopy & Color · Light transmittance

CH1020 Light Transmittance Meter — VLT, IR rejection, SHGC and TSER

The CH1020 light transmittance meter (COLO product code PRO7935) is a compact meter for solar-control film and glazing: VLT, UV and IR rejection, SHGC and TSER. It measures VLT, UV rejection, IR rejection (940 nm, 1400 nm, full band), SHGC, TSER in about 0.5 s, for samples up to 47 mm thick.

Which instrument?

VLT, UV and IR 940 nmCH1010Glass and window film · 0.5 sSolar-control filmCH1020IR 940/1400 nm · SHGC · TSERHaze of transparent materialsCH1100Haze meter · ASTM D1003

Overview

Switch on — the meter calibrates itself — slide the glass or film into the slot and read the values on the 3.5″ colour screen. Weighing 515 g and powered over USB-C, it works in the laboratory, at incoming control and on site.

Key characteristics

• Light sources: UV, visible, infrared 940 nm, 1400 nm and full band
• Silicon photodiode sensors; Visible 380–760 nm; infrared peaks 940 and 1400 nm; full-band infrared
• Measured: VLT, UV rejection, IR rejection (940 nm, 1400 nm, full band), SHGC, TSER
• Resolution 0.1 %; accuracy better than ±1.5 % (colourless uniform translucent sample)
• Samples up to 47 mm thick; automatic calibration at switch-on
• 3.5″ colour screen, USB; 5 V DC over USB-C; 203 × 120 × 29 mm, 515 g

Suitable for

• Window film — tinted and solar-control film before and after fitting
• Architectural and automotive glass
• Transparent plastic sheets and covers
• Incoming control of glass and film

What do VLT, UV and IR rejection mean?

Glass and window film are chosen by how much daylight they let through and how much ultraviolet and heat they keep out. VLT (visible light transmittance) is the share of daylight that passes, in %. UV rejection is the share of ultraviolet radiation blocked, IR rejection the share of infrared (heat) blocked — at 940 nm, at 1400 nm and over the full infrared band.

• VLT — brightness through the glass; legal limits apply to vehicle glazing in many countries.
• UV rejection — protection of interiors, goods and skin.
• IR rejection — heat kept out; the main value for solar-control film.
• SHGC / TSER — solar heat gain coefficient and total solar energy rejected, the summary values used in window-film specifications.

Transmittance meter or haze meter?

Both measure how light passes a transparent sample, but for different questions. The transmittance meter answers how much light, UV and heat pass glass or film; a haze meter answers how clear or milky a material looks.

On the instrument

Clear readoutVLT and rejection values shown together on the 3.5″ screen.

Slot for flat samplesGlass, film or sheet up to 47 mm thick slides into the gap.

Which model? — comparison

Both meters share the same compact body, 0.5 s measurement, 0.1 % resolution, ±1.5 % accuracy and samples up to 47 mm. They differ in the infrared values:

• CH1010 — VLT, UV and 940 nm IR rejection: the quick check of tinted glass and film.
• CH1020 — adds 1400 nm and full-band IR, SHGC and TSER for solar-control film and glazing.

Standard delivery

• CH1020 light transmittance meter
• Power adapter, data cable
• User guide

Calibration check on request. The delivered configuration for a specific order is the one confirmed in the COLO.Science quotation.

Knowledge base

Haze, transmittance, clarity and the 0/d geometry are explained in the Haze Measurement Guide, colour values in the Colour Measurement Guide, and practical examples on COLO.Science, our knowledge base.

Selection guide

• Haze, clarity or colour of transparent plastics and film: the CH1100–CH1810 haze meters.
• Colour of opaque samples: the CS60 benchtop spectrophotometers.
• Not sure which method or values your customer means? Send us the specification — we confirm it with the quotation.

Configuration notice

This page is provided for orientation and product selection. The model and the values you report are confirmed with the official COLO.Science quotation.

Sales and support for international customers

COLO Lab ExpertsPolje ob Sotli 4, SI-3255 Buče, Slovenia
Phone: +386 70 713 437 · Email: sales@colo.si · Web: colo.si
We supply laboratories across Europe directly and through partners. B2B prices are quoted net, excluding VAT.

Checking glass or window film?

Send us the type of glass or film and the values you need — we propose the model and confirm it with the quotation.