I. Core Parameters

Parameter Category	Specific Parameter Item	Specification / Parameter Value	Description
Basic Temperature Measurement Performance	Sensor Type	Pt1000 Resistance Temperature Detector (RTD)	High precision, excellent linearity, suitable for heat meter temperature measurement needs
	Temperature Measurement Range	0~150℃	Matches the regular operating temperature range of hot water pipelines
	Accuracy Class	Class A, Class B	Relative error ≤0.1℃ when used in pairs, meeting the high-precision requirements of heat metering
	Minimum Measurable Temperature Difference	△Tmin≤3℃	Can accurately capture small temperature changes before and after hot water pipelines
Structure & Installation	Probe Specification	Diameter Φ6mm, Material: SUS304 Stainless Steel	Corrosion-resistant and wear-resistant, suitable for hot water medium
	Protection Tube Specification	Diameter Φ8mm, Material: SUS304 Stainless Steel	Provides mechanical protection for the probe and extends service life
	Installation Length	Standard specifications: 85(105)mm, 120(140)mm, 210(230)mm	Adapts to installation depth requirements of different pipe diameters
	Process Connection Method	G1/2B Fixed Thread	Firm installation, compatible with pipeline interface standards
	Applicable Pipeline	DN65~DN250 hot water pipelines	Covers common pipe diameters of community main hot water pipelines
Environment & Protection	Operating Ambient Temperature	0~70℃	Adapts to regular ambient temperature around pipelines
	Protection Grade	IP54	Dustproof and splash-proof, suitable for outdoor or humid installation scenarios
	Insulation Resistance	≥100MΩ under regular conditions	Ensures stable signal transmission and avoids short-circuit interference
Structural Components	Junction Box	Temperature resistance up to 200℃	Protects internal wiring and adapts to high-temperature environments

II. Product Features

High-precision Temperature Measurement for Reliable Metering: Adopts Pt1000 RTD core, with optional Class A/Class B accuracy. The relative error is ≤0.1℃ after paired calibration, which can accurately capture small temperature changes in hot water pipelines and ensure the accuracy of heat metering.

Easy Replacement Without Pipe Cutting: Equipped with G1/2B fixed thread protection tube. Only the internal sensor needs to be taken out for replacement without draining hot water from the main pipeline, greatly reducing maintenance workload and downtime losses.

Robust Structure with Strong Adaptability: Both the probe and protection tube are made of SUS304 stainless steel, featuring corrosion resistance and wear resistance, suitable for hot water medium; IP54 protection grade can resist the impact of outdoor humidity, dust and other environmental factors.

Standardized Design for Flexible Installation: Suitable for DN65~DN250 common hot water pipelines, with multiple standard installation lengths available; G1/2B threaded interface complies with industrial standards, requiring no additional customized adapter components.

Excellent Insulation for Stable Signals: Insulation resistance ≥100MΩ effectively avoids signal short-circuit or interference, ensuring stable transmission of temperature data to the heat meter host.

III. Related Component Specifications

Core Temperature Measurement Components

Pt1000 RTD Probe: Wound with high-purity platinum wire, featuring excellent linearity and stable thermoelectric performance; diameter Φ6mm, length matched with installation length, capable of quickly responding to temperature changes.

Protection Tube: Made of SUS304 stainless steel, diameter Φ8mm, uniform wall thickness, high mechanical strength, can resist water flow scouring in pipelines and external mechanical collisions.

Installation & Connection Components

Threaded Joint: G1/2B standard thread, made of the same material as the protection tube (SUS304 stainless steel), high thread precision, strong sealing after installation to prevent water leakage.

Junction Box: Temperature resistance up to 200℃, shell made of flame-retardant and high-temperature resistant material, built-in terminal block, clear wiring, easy to connect with the heat meter host.

Sealing & Protection Components

Sealing Ring: Made of high-temperature resistant and anti-aging rubber material, ensuring the sealing of threaded interface during installation to prevent hot water leakage.

Protection Structure: The connection between the junction box and the protection tube adopts a sealed design, combined with IP54 protection grade, effectively preventing dust and water splashes from entering internal components.

IV. Application Scenarios

As a core temperature measurement component of heat meters, this product is mainly used in hot water heat metering scenarios with the advantages of "high precision, easy maintenance and wide adaptability", including:

Community Central Heating Systems: Temperature monitoring of inlet and outlet of community main hot water pipelines, paired use for accurate measurement of heat consumption, providing data basis for heating fee collection.

Commercial Building Heating: Temperature measurement of hot water pipelines in large buildings such as shopping malls and office buildings, suitable for DN65~DN250 pipe diameters, easy replacement feature reduces operation and maintenance costs.

Industrial Hot Water Systems: Temperature monitoring of hot water transmission pipelines in industrial production, SUS304 material is suitable for industrial hot water medium, high precision ensures accurate process heat metering.

Heat Exchange Station Supporting: Temperature collection of hot water pipelines output by heat exchange stations, used with heat meters to provide accurate data for heat exchange efficiency regulation.

V. Product Advantages

Accurate Metering Compliant with Standards: Pt1000 RTD core + paired calibration design meets the high-precision requirements of the heat metering industry, with traceable data and reliable metering results.

Efficient Maintenance with Controllable Costs: Sensor replacement without pipe cutting reduces maintenance time and water resource waste, lowering operation and maintenance labor and material costs.

High-quality Material for Long Service Life: SUS304 stainless steel probe and protection tube, corrosion-resistant and wear-resistant; IP54 protection grade improves environmental adaptability, service life is extended by more than 30% compared with ordinary sensors.

Easy Installation with Wide Adaptability: Standardized G1/2B threaded interface + multiple installation lengths, suitable for DN65~DN250 mainstream hot water pipelines, can be installed without pipeline modification.

Stable Signal with Strong Anti-interference Ability: High insulation resistance design + sealed protection structure effectively resists humidity, electromagnetic and other interferences, ensuring stable transmission of temperature signals.

VI. Frequently Asked Questions

Why are the sensors used in pairs? Can they be replaced individually?

Answer: They are used in pairs to accurately measure the temperature difference between the inlet and outlet of the pipeline and ensure the accuracy of heat calculation. The relative error is ≤0.1℃ after paired calibration; they can be replaced individually, but the new sensor needs to be recalibrated with the original one to ensure the error meets the requirements and avoid affecting metering accuracy.

What sealing precautions should be taken during installation?

Answer: ① Install the matching sealing ring at the threaded joint to ensure no hot water leakage after tightening; ② Tighten the junction box cover to avoid humid air entering the interior and causing wiring oxidation; ③ Ensure the sensor is inserted to the proper depth, and the probe is completely immersed in hot water to avoid temperature measurement errors caused by insufficient contact.

What is the recommended calibration cycle for the product?

Answer: It is recommended to calibrate once a year under regular use scenarios; for long-term use in pipelines with high temperature (close to 150℃) or poor water quality, the cycle should be shortened to 6 months to ensure the temperature measurement accuracy meets the heat metering requirements.

Can it be adapted to other media (such as cold water, corrosive liquids)?

Answer: It is suitable for hot water medium (0~150℃) by default; it can be directly used in cold water scenarios, but it is necessary to confirm that the water quality is non-strongly corrosive; for corrosive liquid scenarios, probes made of corrosion-resistant materials (such as 316L stainless steel) need to be customized, otherwise it will cause corrosion damage to the protection tube and probe.

The junction box is resistant to 200℃, does it mean the sensor can work in 200℃ environment?

Answer: No. The 200℃ temperature resistance of the junction box refers to the maximum temperature it can withstand. The core temperature measurement range of the sensor is 0~150℃. Exceeding this range will cause the failure of Pt1000 RTD performance, so it must be used strictly within the rated temperature measurement range.