H.VIR® 85, type 21

The H.VIR® 85 type 21 is the most frequently used infrared window of the H.VIR® range, thus meeting the most frequent requirements regarding thermographic inspection of electrical equipment. It allows you to carry out preventive maintenance with the help of an infrared camera in electrical conditions of normal charge (low and high voltage).

You can install the H.VIR® 85 type 21 IR window to new equipment or retrofit it to existing equipment (it will last the full life of the equipment). The H.VIR® 85 type 21, like other optical windows of the H.VIR® range, allows you to prevent any risks associated with electrical equipment without pre-inspection.

Category : H.VIR®

H.VIR® 85 type 21 IR window – Technical information

Operation from 0.3 µm to 13 µm

Sensitivity to UV: none
Quality of optical window:
- Parallelism: < 3 µm
- Flatness: 5(2)
- Surface condition: P4 (S/D: 20/ 40)

Operating temperature -40°C + 70°C
Electrical insulation of the frame:
- Resistivity 4 x 10 15 ohms cm2/m at 20°C
- 8 x 10 15 ohms cm2/m at 100°C

Download the product brochure

Request a quote

Installing a H.VIR® 85 type 21 infrared window for thermal inspection on a piece of electrical equipment does not degrade or affect the equipment’s level of safety. The H.VIR® 85 type 21 optical window like the whole H.VIR® range guarantees the protection of controlling equipment and infrastructures. The H.VIR® 85 type 21 IR optical window complies with current international standards and with the particular specifications of electrical material manufacturers.