Alla wet and dry hygrometer 0 +100°C: 1°C

Introduction to the Alla 0 to +100°C wet and dry bulb hygrometer

The Alla wet and dry bulb hygrometer, model 74900-002-CA, is an instrument for measuring temperature and determining air humidity manufactured by Alla (France). The device operates on the psychrometric principle based on the temperature difference between the dry and wet bulbs to determine relative humidity. Made in France, it is ideal for microclimate monitoring in storage areas and laboratories.

Outstanding features

• Temperature measuring range from 0 to +100°C with clear 1°C graduations for easy reading.
• Uses a red liquid column, mercury-free, ensuring safety for users and the working environment.
• Durable plastic body with a protective roof design to reduce external impacts.
• Integrated humidity conversion table printed directly on the body for quick reference.

Applications

• Monitors temperature and humidity conditions in testing and quality control laboratories.
• Controls ambient conditions in warehouses storing samples, supplies, and raw materials.
• Used in meteorological studies, educational institutions, and agricultural and industrial production facilities.

Frequently Asked Questions

Is the liquid inside the Alla 74900-002-CA thermometer toxic?
The instrument uses a red indicating liquid that is completely mercury-free, ensuring safety in case of accidental breakage.

How do you read the relative humidity on the device?
Record the temperatures of both dry and wet bulbs, calculate the temperature difference, and look up the relative humidity on the chart printed on the thermometer body.