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HTM228 4-20mA Protective Temperature Transmitter With Junction Box

Measuring Range: -40~1500℃
Output: 4~20mA,RS485, HART
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HTM228 protective temperature transmitter is a device designed for accurate temperature measurement and control in industrial processes. It utilizes a PT100 sensor as the signal measurement component, known for its high accuracy and stability in temperature sensing.

The transmitter includes an amplifier circuit housed within a protective enclosure. This circuit converts the sensor signal from the PT100 into a standard signal, such as a current or voltage output. This facilitates easy integration with other instrumentation and control systems.

HTM228 transmitter undergoes rigorous testing and aging processes for its components, semi-finished products, and finished products. This ensures the product's reliability and performance over time. The careful quality control measures employed during production contribute to its excellent reliability.


On-site temperature measurement and control are crucial in various industries, including:

  • petroleum

  • chemical industry

  • metallurgy

  • electric power

  • hydrology, etc.


  • High cost performance

  • Shell protection grade IP65

  • The material in contact with the medium is stainless steel, which has good corrosion resistance.

  • Suitable for temperature measurement of fluid media, long-term stable operation

  • Impact resistance, vibration resistance, corrosion resistance

Technical Parameters

Measuring   Temperature Range


Measuring   Medium

various liquid, gas, or steam compatible with 304   or 316L stainless steel



Long-term Stability


Insertion   Depth


Installment   Thread


Operation   Temperature


Storage   Temperature


Supply   Voltage


Output Signal

2-wire 4~20mADC

Protection   Grade


Electrical Connection


Our product philosophy is specialization, customization, and intelligence.

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    Add : Room 201, Building 5, No.18, Fenghua Road, Yuhua Economic Development Zone, Nanjing, Jiangsu,China
    Phone : +86-13270442058
    E-mail : info@hjsensor.com
   Whatsapp : +86-13270442058
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