The bimetal
thermometers is a type of thermometer widely used in the industry.
Reliability this types of thermometer offers the ability to withstand
vibration, high temperature fluid and corrosion with the use of stainless
steel.
Often used in industry, facilities, machines,
warehouses. Among them, it stands out in the petrochemical, pharmaceutical and
food areas, among others.
Calibration
of a Bimetallic Thermometer
You should consider periodically calibrating the
thermometers for the readings to be accurate.
Also when you want to use for a fully inverted
temperature. For example, if it was used for positive temperature and you want
to use it at negative temperature.
There are two methodologies used to calibrate this
type of thermometer; The point of Ice and point of Boil .
In both cases you must use an insulating container
on its walls.
The point of Ice is to use the ice in the container
by adding cold water. Prevent the tip of the thermometer from interacting with
the walls and bottom of the container.
The objective is to wait for the needle to finish
moving, for when this happens we must register and adjust the thermometer in
the adjustment screw.
Similarly with the boil point method. We need to
submerge the tip when the water is boiling, wait for the needle to stabilize and
record the data by adjusting the screw on the back of the thermometer.
How does it
work
The needle is connected to a transmitter, and this
with a sensitive spiral that is welded to the base of a tube that interacts
with the medium to be measured.
When the spiral receives the temperature, it
expands according to the temperature. He transmits it to the needle thanks to
the procedures and with this we see it reflected in the box.
Advantage
Features may vary and there will be different
designs. Then consider the following advantages as the attributions that this
type of thermometer has.
Withstands
high temperatures
There is a Bimetal Thermometer that can withstand temperatures above 500 °
C.
They also withstand temperatures below zero degrees
Celsius.
Remember to refer to the technical specifications
of the specific product to be purchased.
Optimal in
aggressive installations
The box is prepared for outdoor conditions.
This is hermetic to avoid the introduction of dust,
water, dirt, oil, among other common conditions in the industry.
Allows
adjustment
Behind the case has an adjustment screw. This will
allow us to recalibrate the bimetallic thermometer when required.
Mainly when our thermometer changes from hot to
cold temperature or vice versa.
Read also: Types of Pressure Gauges for Industrial Use
