Vaonis Vespera Hygrometer Sensor

Clearer observing in damp or cold conditions starts with the right accessory, and the Vaonis Vespera Hygrometer Sensor integrates neatly with the Vespera system to help manage fogging at the lens. This telescope accessory monitors temperature and humidity, then automatically activates Vespera’s anti-fog system when the required threshold is reached, generating continuous heat around the lens to reduce condensation.

Made for use with Vespera and compatible with filters, the sensor fits discreetly into the optical arm and measures under 13mm. It is particularly useful in humid regions and during colder weather, including winter conditions close to 0 Celsius, where fogging can affect observation quality, image sharpness and acquisition times. Installation uses the supplied screw and mini screwdriver, while ambient temperature and humidity can be checked through the Singularity app once fitted.

Key features

• Hygrometer sensor for Vaonis Vespera
• Automatically switches the anti-fog system on and off according to temperature and humidity
• Continuous heat around the lens helps reduce fogging
• Compatible with the use of filters
• Fits discreetly into Vespera’s optical arm
• Measures under 13mm
• Model number: AC024

Specifications

• Product type: Astro photography accessory
• Net weight: 100g
• Weight: 0.20kg

In the box

• Hygrometer with screw ready to be fitted
• Mini screwdriver

Support & warranty

• 2-year warranty

Rackhams Reference : I8JXD18HIG