• What does this instrument measure?
Three things on one dial: air pressure with a Hi-Sensitive barometer, temperature, and relative humidity. This gives you the weather and indoor climate at a glance.

• Does the instrument require a battery?
No. All three measurements are analog; no battery or power is needed.

• How do I read the barometer?
Do not just look at the current reading, but primarily at the difference compared to the previous measurement and how quickly the pressure is changing. Rapid pressure changes indicate short-term weather changes; slow changes indicate longer-term weather shifts. The Hi-Sensitive hand moves 1.5× further, allowing you to see the trend sooner.

• Where should I hang the instrument?
Indoors, out of direct sunlight, and not above or next to a heat source. That way, you are measuring the room, not the heater. After being moved, the thermometer and hygrometer need about an hour to adjust.

• Does it work at any altitude?
The instrument is calibrated for sea level. If you are using it above 800 meters, please let us know in advance.

• How do I mount it?
A separate mounting plate is available for the A130 series. You screw this to the wall and then secure the instrument with the thumb nuts.

• Is there a warranty?
Yes, you receive a 2-year statutory warranty. This covers defects not caused by external factors or improper use.