What is a temperature gauge?
Temperature gauge measures the thermal state of a homogeneous substance. The measuring system must be brought as closely together as possible with the body to be measured. The most widely used measuring methods for temperature measurement rely on temperature-dependent characteristics of the body and substance.
How does a bimetal temperature gauge work?
Bimetal temperature gauges operate with a measuring system in the form of a helical or spiral tube. The measuring system consists of two sheets with different expansion coefficients, which are inseparably joined. Through the mechanical deformation of the bimetal strips in the aforementioned tube types, a rotational movement results, caused by temperature changes. If one end of the bimetal measuring system is firmly clamped, the other end will rotate the pointer shaft. Bimetal temperature gauges are available with a measuring range of -70 … +600 °C (-94 … +1,112 °F) in accuracy classes 1 and 2 in accordance with EN 13190.
When is an expansion temperature gauge suitable?
An expansion temperature gauge consists of a temperature probe, a capillary and a Bourdon tube, and is also suitable for temperature measurement at remote measuring locations. The measuring system itself is filled with a liquid. If the temperature changes, the internal pressure of the temperature gauge with probe will change as well. The pressure is transferred via a tube to a pointer shaft and thus the temperature value is indicated on the scale. Using remote capillaries from 500 … 10,000 mm long, measurements can also be taken from remote measuring locations. The measuring ranges for expansion temperature gauges lie between -40 … +400 °C with class 1 and 2 accuracies in accordance with EN 13190.
How does a temperature gauge using the gas-actuation principle work?
With a gas-actuated temperature gauge the stem, the capillary and the Bourdon tube are joined together into one unit. The instrument is filled with inert gas. If the temperature changes, the internal pressure will also change. The pointer is moved by the action of the pressure via a measuring tube. To compensate for the ambient temperature, a bimetal element is mounted between the movement and the measuring tube. Gas-actuated temperature gauges are available with scale ranges between -200 … +700 °C (-328 … +1,292 °F) in accuracy class 1.
FAQs – Temperature Gauge Stem Type:
1. How does an analog temperature gauge ensure accurate readings in stem-type installations?
An analog temperature gauge provides precise mechanical readings, and when paired with a stem-type design, it ensures direct temperature sensing for improved accuracy in industrial applications.
2. Can an analog temperature gauge be used for both liquid and gas temperature monitoring?
Yes, a stem-type analog temperature gauge is suitable for monitoring the temperature of liquids, gases, and steam lines, making it versatile for multiple process environments.
3. Does the installation height or immersion length affect the performance of an analog temperature gauge?
Correct immersion depth is essential for an analog temperature gauge, as proper stem placement ensures fast response times and reliable temperature measurement.
4. How durable is an analog temperature gauge in high-vibration or outdoor environments?
A high-quality analog temperature gauge with a rugged stem construction can withstand vibration, weather exposure, and harsh operating conditions while maintaining long-term accuracy.
The stem type analog temperature meter with the 1/2″ BSP connection was easy to install directly into our thermowell. Its IP65 rating holds up well against dust and water splashes. It’s a simple, reliable mechanical sensor for daily use.
The overall build quality and finish on this analog temperature meter are fantastic, especially the robust crimped bezel design. It performs reliably within its $\pm 1\%$ accuracy class
This analog temperature meter provides immediate, accurate readings, making monitoring effortless without needing any power source.
This analog temperature meter is built to industrial standards, handling a wide range up to $400^{\circ} \text{C}$. The large, clear dial makes readings quick and accurate, contributing directly to our boiler efficiency checks.
We chose the capillary type analog temperature meter to read inaccessible points from a distance