Hongqi 2.5inch temperature pressure gauge
Specifications
Using and Maintenance

1. The stem length for inserting into measured medium should longer than temperature-sensing element, Ordinary the insert length should longer than 100mm, when temp is 0-50ºC, the insert length should longer than 150mm, so that can ensure the accuracy.

2. In the process of storage, using and transportation, the stem should avoid impact,  Don't make the stem bending deformation and don't use the case as wrench.

3. Bi-metal thermometer is not suitable for measure the medium temp in open type container. Electric contact type is not suitable to use in the environment which have big vibration.

4. Bi-metal thermometer should routinely inspect,  It is advisable to general inspection once every 6 months.

5. Electric contact bi-metal thermometer is not allow to working in the big vibrated environment, in case to effect the reliable of the product.

Hongqi Instrument Co., Ltd. was established in 1993 and is a modern technology-based enterprise specializing in the research and development, production, sales, and service of pressure and temperature instruments. Located in "the Taihu Lake Lake Wangxian County" Zhejiang Changxing Economic Development Zone, it has two major production bases, Wenzhou and Changxing. The company covers an area of 50000 square meters and has over 1000 employees. Our products cover the whole country, with 21 offices and hundreds of agents; At the same time, the products are exported to dozens of countries and regions such as Europe, America, the Middle East, and East Asia.
Since its establishment, the company has always adhered to the principle of being the foundation and technological innovation as the driving force for development. There are currently 17 production workshops, 1 mold processing center, 1 provincial-level enterprise technology center, and 1 central laboratory. Strong technical strength and strong technological innovation capability. After more than 30 years of development, it has become a leading enterprise in the national instrument manufacturing industry.

Introduction to Temperature and Pressure Gauges
The thermohygrometer is a comprehensive instrument capable of simultaneously measuring temperature and pressure, widely used in various fields such as industrial production, scientific research, and environmental monitoring.
working principle
The temperature and pressure gauge typically integrates a temperature sensor and a pressure sensor. Temperature sensors often operate on the principles of thermistors or thermocouples. Thermistors rely on the characteristic that the resistance of a metal conductor changes with temperature, measuring this resistance to determine the temperature; thermocouples, on the other hand, utilize the thermoelectric effect generated by two different metals under a temperature gradient for temperature measurement. Pressure sensors generally function based on the piezoresistive effect or piezoelectric effect, converting pressure signals into electrical signals for measurement. The signals collected by these sensors are processed by a circuit to produce intuitive temperature and pressure readings, which are then displayed on the dial or digital screen.
Product Features
Multi-function integration: Combines temperature and pressure measurement functions into one, saving installation space and costs while allowing users to simultaneously obtain both critical parameters.
High-precision measurement: Utilizing advanced sensing technology, it delivers highly accurate temperature and pressure readings, meeting the data accuracy requirements of various application scenarios.
High reliability: It features excellent anti-interference capability and stability, enabling continuous and stable operation under various environmental conditions to ensure the reliability of measurement data.
Easy to operate and read: The design is user-friendly, with simple and convenient operation. The dial or digital display is clear and intuitive, allowing users to quickly read measurement data.
application field
Industrial production: In industries such as chemicals, petroleum, and power, temperature and pressure gauges are used to monitor the temperature and pressure within equipment like reactors and pipelines, ensuring the safety and stability of the production process. For instance, in chemical production, precise control of reaction temperature and pressure directly impacts product quality and production efficiency.
Scientific Research Experiments: In laboratory settings, temperature and pressure gauges provide accurate data for various experiments, enabling researchers to better control experimental conditions and ensure the accuracy and reproducibility of results.
Environmental Monitoring: Used to monitor atmospheric temperature and air pressure, providing critical data support for weather forecasting and air quality monitoring. Additionally, in special environments such as mines and underground tunnels, temperature and pressure gauges can monitor environmental parameters in real time to ensure personnel safety.
HVAC system: Assists in regulating and controlling indoor temperature and pressure to achieve a comfortable indoor environment while optimizing energy utilization efficiency and reducing energy consumption.

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