Intelligent Calibration and Verification Device for Mining Temperature Sensors

I. Product Usage
The BWJK-II Mining Temperature Sensor Calibration and Verification Device (Intelligent Type) is a temperature calibration device specifically designed for the coal mining industry. It is primarily used for the periodic calibration, performance testing, and accuracy verification of various temperature sensors in underground coal mines and surface applications.
As a standardized supporting device for temperature sensor calibration in the coal industry, this equipment supports the simultaneous measurement of three temperature sensors, meeting the needs of various application scenarios: it serves as an ideal metrological standard device for coal mine production inspection institutions, mining bureaus, regional coal mine instrument metrology stations, and various metrology technical institutions to carry out calibration work for mining temperature sensors. It can also be used as a core standard device for temperature sensor manufacturers to conduct factory inspections, ensuring that products meet industry quality requirements.
II. Execution Standards
This device is manufactured in strict compliance with specialized standards for the coal mining industry. The specific execution standards are as follows:
MT381-2007 "General Technical Conditions for Temperature Sensors in Coal Mines": Specifies the technical requirements, test methods, and inspection rules for coal mine temperature sensors, serving as the core basis for the device's calibration accuracy;
MT872-2000 "Technical Conditions for Protective Devices of Coal Mine Belt Conveyors": Addresses the characteristics of temperature sensors used in coal mine belt conveyors, standardizing the calibration process for such sensors.
III. Product Features
1. Wide Temperature Range with High Accuracy and Strong Adaptability
The device covers a broad temperature range, reaching **(-10 to 100)°C**, making it compatible with various types of temperature sensors in the coal mining industry;
It uses a specially designed constant-temperature liquid bath as a stable temperature source, with a temperature fluctuation of only **±0.05°C**, providing a stable environment for calibration and ensuring data accuracy.
2. Efficient Cooling and Temperature Control with User-Friendly Operation
The temperature source adopts an integrated constant-temperature liquid bath design, paired with an air-cooled fully enclosed compressor unit for fast cooling and low operational noise;
The control system utilizes PID automatic control technology, with a temperature display accuracy of 0.01°C. The inner tank and platform are made of stainless steel, offering corrosion resistance and easy cleaning;
The liquid bath supports the simultaneous insertion of 3 to 5 temperature sensors and one standard second-class mercury thermometer, enabling synchronous comparative calibration of multiple sensors.
3. Intelligent Display and Reporting with Data Visualization
It enables synchronous collection and display of sensor readings and corresponding output signal values (frequency or current), avoiding data deviations;
Supports simultaneous display of three temperature measurement values, using a highly reliable computer as the display control terminal with an intuitive and clear interface, lowering the operational threshold;
Features automatic generation of calibration or verification reports, equipped with a printer interface, and allows the creation of customized reports based on user needs to meet data recording requirements in various scenarios.
4. Flexible Signal Conversion for Compatibility with Multiple Sensor Types
For the common frequency and current output signals of coal mine temperature sensors, the device enables easy selection and conversion without the need for additional accessories, improving calibration efficiency.
5. Accurate Load Testing in Compliance with Regulatory Requirements
Supports line load testing according to calibration procedures, strictly measuring the impact of load changes on sensor accuracy to ensure sensor stability under actual working conditions.
6. Stable Power Supply System Supporting Multi-Parameter Testing
Equipped with a DC stabilized power supply with dual functions of voltage and current stabilization. The output voltage can be adjusted within the range of 0–30V, and the maximum output current can be set freely within 0–2A;
Enables current and voltage performance testing of sensors through the power supply system, comprehensively examining the electrical characteristics of sensors.
7. Constant-Temperature Incubator for Response Time Testing
Includes a dedicated constant-temperature incubator that maintains a stable water temperature of 5–65°C in an environment of approximately 25°C room temperature, providing the required conditions for temperature sensor response time testing.
8. Customized Insulated Fixtures for Special Probes
Customized insulated fixtures of various types can be produced based on the dimensions of temperature probes and sensor prototypes provided by users, addressing the challenges of fixing and calibrating special sensor models.
9. Integrated Structural Design for Durability and Easy Maintenance
The device adopts an integrated structure with an aesthetically simple and robust body, capable of withstanding the complex working environments of the coal mining industry;
Simplified operational procedures and convenient daily maintenance reduce user operation and management costs.
IV. Main Technical Specifications
Specification Category
Specific Parameters
Temperature Measurement Range
(-10 to 100)°C
Temperature Measurement Accuracy
±0.2% FS
Sensor Power Supply
0–30V DC, Maximum Output Current 2A
Frequency Measurement Range
0Hz–5000MHz, Measurement Accuracy ≤1×10⁻⁶
Current Measurement Range
0–200mA, Accuracy Class 0.1
Load Resistance
500Ω ± 0.01%
Device Power Supply
AC220V, 50Hz
Incubator Temperature
5–65°C (at 25°C room temperature)
Number of Simultaneous Calibration Channels
3 Channels

V. Recommended Reasons
The Zhengzhou Aidi Technology BWJK-II Mining Temperature Sensor Calibration and Verification Device (Intelligent Type) meets the temperature calibration needs of the coal mining industry. It covers a wide temperature range with达标 accuracy, supports synchronous calibration of multiple sensors and customized adaptability, and features intelligent report generation and a durable structural design. It can fulfill the diverse calibration scenarios of metrology institutions, mining bureaus, and sensor manufacturers, making it a practical device for ensuring the accuracy of coal mine temperature sensors.