What is a hygrothermograph?
Hygrothermograph is a device that is used to record temperature and humidity on the line chart. It can be either battery or spring. The device records data in the form of a line on the role of paper, which is mounted on a rotating drum that changes at a predetermined speed. This system provides visual representation of temperature and humidity fluctuations in a given period of time. The lines on the graph are drawn by two separate pens, one connected to the element sensing the temperature and the other connected to the moisture reducing element. Hygrothermographs are often used in areas where it is important to monitor moisture fluctuations and temperatures such as laboratories, museums and agricultural warehouses.
The temperature sensing element in the hygrothermograph is a bimetallic belt. This component, which is also used in thermostats and other mechanical instruments, consists of two separate metals welded together. Both metals are expanding the contract on different rates with temperature changes, causing pThe blade displaced in the side direction. The lever system that is connected to the strip increases the shift and moves the upper pen arm up and down through the roll of paper and creates a temperature changes in the form of a line graph.
Hygrothermograph reduces humidity using a bundle of human hair, which has been specially treated for this purpose. As moisture varies in the atmosphere, hair expands or contrast. The movement is mechanically transferred to the lower arm of the pen that moves up and down to record moisture.
The drum rotation speed determines the time at which the hygrothermograph is recorded. Many hygrothermographs can be set for different time intervals, depending on how much data is required. One day it can cover faster rotations, and the slotting could allow the graph to cover throughout the month. Hygrothermographs pickled in the spring generally have a limit of about seven days before they must be reset.
If the device is used, poor ventilation may occur, false values may occur. Axial fan, which is optional as a supplement in many Hygrothermograph models, can help this problem. The fan works by actively drawing air from the room to the device, allowing faster and more accurate data recording. The fan requires the electricity start, so it can only be used if there is a power supply or other energy source in the area.