- Accurate Measurement Comparison: The contrast pencil on the lens allows for easy comparison of measurement values, helping you determine whether atmospheric pressure is increasing or decreasing over time. - Precision Instruments: Features a hair spring for temperature sensing, a wet hair spring, gear structure barometer movement, and a 1-second clock mechanism with durable metal hands. - Wide Measurement Range: - Temperature: -30 to 50 °C, Accuracy: ±2 °C - Hygrometer: 0 to 100% RH, Accuracy: ±5% RH (optimal range 40-70% RH) - Barometer: 950 to 1070 hPa, Accuracy: ±5 hPa (optimal range 980-1040 hPa) - Robust Construction: Made with a solid brass housing, base, and an acrylic lens, ensuring durability and longevity. - Versatile Applications: Ideal for use in various environments such as ships, factories, laboratories, and homes. - Practical Use Cases: - Monitor atmospheric changes for sailing or outdoor activities. - Maintain optimal conditions in laboratories or manufacturing processes. - Track indoor climate for better home comfort. This product combines functionality with reliability, making it an essential tool for anyone needing precise environmental monitoring.