DL Type Heat Meter Sensors - China DL Type Heat Meter Sensors Manufacturers Factory

Your Professional DL Type Heat Meter Sensors Supplier

Chongqing Duchin Instrument Co., Ltd. specializes in the research, development, manufacturing, and distribution of temperature sensors and related equipment. The company’s primary product offerings include thermocouples, resistance temperature detectors (RTDs), compensation cables, electric heaters, thermocouple vacuum calibration devices, and composite metal protective tubes. In addition, the company undertakes instrumentation and control system projects based on customer requirements.

Why Choose Us

Team & Service

Our team is a dynamic,Quickly respond to customer needs, experienced technical team, provide design and customization services.

Wide Range of Applications

Our products are widely used in FTTH (Fiber to the Home) and FTTA (Fiber to the Antenna) applications.

Our Certificates

We have established a quality assurance system compliant with ISO9001 standards. Our products are strictly tested according to IEC, GR-326-Core, GR-3120-Core, GR-771-Core, and GR-1221-Core standards to ensure superior performance and reliability.

Broad Market

Our products are exported to a wide range of Market layout in Asia, Europe, Middle east, North America, South America, Africa.Products are exported over 50 countries, and are widely recognized by customers.

Parameter

Sensor element	Pt100,PT500,Pt1000
Accuracy	Class A,Class B
RTD probe	Ø6;SUS304
Thermowell	Ø8;SUS304
Structure	Connection box 200℃;Cable leads 150℃
Cable Termination	Tin-plated wires,Terminal cap
Process connection	G1/2B
Wire material	PVC 85℃,PUR 105℃,Silicone 150℃,PTFE 250℃
Length of cable	1500mm(standard),as per client's demand
Fitting length	85(105),120(140),210(230)mm be standard
Temperature	0 to 150℃
Temperature difference	△Tmin ≤3℃
	≤0.1℃ within one pair
Insulation resistance	≥100MΩ under normal condition
Protection class	IP54
Ambient conditions	0 to 70℃

Video

Types of DL Type Heat Meter Sensors

The DL type heat meter sensors produced by our company mainly include the following types:

Pt1000 Rtd Temperature Sensor

The heat meter temperature sensor consists of five components: temperature sensing element, thermal conductor, protective sheath, mounting thread, and lead wires. It generally uses Pt1000, tolerance level B, pairing accuracy less than 0.06℃.

Pt500 Rtd

The heat meter temperature sensor is one of the key components of the heat meter and is used to measure the temperature deviation of water before and after it passes through the heater.

Advantages of DL Type Heat Meter Sensors

Accurate Temperature Measurement
DL type sensors are specifically designed to measure the supply and return temperatures in heating and cooling systems. When used in conjunction with precision resistance temperature detectors (RTDs) like the PT1000, they provide high accuracy and stability over a wide temperature range, essential for reliable data for energy calculations.

Enhanced Energy Calculation
Precise temperature readings from DL sensors, like those in a PT1000 sensor, are crucial for accurate calculation of heat or cooling energy consumption. Even minor deviations in temperature readings can impact energy measurement and billing accuracy.

Optimal Thermal Coupling
Direct mounting of DL type sensors without an additional immersion sleeve is often recommended. This ensures optimal thermal coupling with the medium in the heating system, leading to more accurate measurements.

Pairing for Differential Temperature Measurement
These sensors are typically paired and specially processed to precisely acquire even the smallest temperature differences between the supply and return flow in closed water circuits. This ensures optimal heat quantity measurements.

Durability and Longevity
With robust construction, DL type sensors, especially those incorporating PT1000 technology, can withstand harsh environmental conditions, contributing to the overall durability and lifespan of heat meters.

Applications of DL Type Heat Meter Sensors

01/

Motors

There are many different aspects of motors and most of these require temperature measurement to ensure the motor itself does not overheat.

02/

Surface Plates

Ring terminal heat meter sensors are often used on surface plates as they can be mounted onto a flat surface and measure temperature effectively.

03/

Home Appliances

Kettles, toasters, washing machines, dishwashers and coffee machines will all contain heat meter sensors.

04/

Computers

Within computers there are heat meter sensors to ensure the system does not overheat

05/

Industrial Equipment

Heat meter sensors used within these applications will need to be robust as the environment can be very demanding.

06/

Warming Electrical Radiators

NTC thermistors are used to control the heat on electric radiators.

07/

Food Production; 3D printed chocolates

Heat meter sensors are used to monitor the temperature of the melted chocolate for 3D printing.

08/

Alcohol Breathalyser

Thermistors are used within alcohol breathalysers to measure the temperature of the subject's breath.

Safety Precautions for DL Type Heat Meter Sensors

1. Select a location for installing the DL type heat meter sensor in which the temperature distribution of the sensing object will not change.

2. Make sure that the length of the DL type heat meter sensor’s protective tubing is sufficient to touch or insert into the sensing object. The length of metallic protective tubing must be at least 20 times its diameter, and the length of non-metallic protective tubing must be at least 15 times its diameter.

3. Do not repeatedly bend the DL type heat meter sensor at the same point. The minimum allowable bending radius of sheathed DL type heat meter sensors is approximately five times the protective tubing diameter. Bending part of the sensor at an acute angle and then extending again may result in broken internal wires or cracks in the element. Do not bend the soldered sections.

4. Do not bend the protective tubing while measuring low temperatures, which will cause the protective tubing to become fragile.

5. Do not bend sheathed DL type heat meter sensors to within 100 mm of the end to protect the sensing section.

6. Do not allow the temperature of the section connecting the protective tubing and lead wire to exceed 70°C for exposed-lead models or 100°C for heat-resistive models.

7. Do not allow the temperature of the terminal box to exceed 100°C for exposed-terminal models or 90°C for enclosed-terminal models.

8. Do not subject the ceramic protective tubing of high-temperature thermocouples to sudden heating or cooling. Ceramic protective tubing has a low resistance to thermal shock. Either preheat the protective tubing or gradually heat to the required temperature.

9. Do not use standard lead wires in locations subject to strong bending stress or on moving parts.

10. If the thermocouple has crimp terminals, use them only as a secondary means of securing the thermocouple. The thermocouple junction of the thermocouple is at the crimped section of the crimp terminals, so a temperature difference occurs between the screw fixating section and the thermocouple junction. Confirm the difference in temperature between the location that is to be measured and the temperature measured by the thermocouple in advance at the actual application temperature.

Ordering Process

Send your detailed request→Feedback with quotation→Confirm price and some details →Provide PI→ Make payment→Start production→Quality checking→Delivery→After service.

Packaging and Shipping

Packaging	All products, we will pack them carefully, items will be pakaged with PP bag, carton or any other protective stuff if necessarily, then placed in pallets or plywood case.
Shipping	We ship by Express, by air, by sea, by train. Normally we checked and compare, then provide customer the most proper shipment method.

Our Factory

The establishment of Chongqing Duchin Instrument CO., LTD was marked in 1995, located at No. 290 Fengshixing Road, Beibei District, covers area over 11'000m2.

Certifications

FAQ

Q: Do heat meters go on flow or return?

A: An energy meter is a device which measures thermal energy on the supply side or return side of a heat generating, heat exchanging device, or cooling source by measuring the flow rate of the heat / cooling transfer fluid and the change in its temperature (delta temperature ΔT) between the supply and return legs of the ...

Q: Should the flowmeter be before or after the control valve?

A: Installing the flow meter before the control valve is a standard engineering practice that helps to ensure measurement accuracy, protect the flow meter from flow-induced disturbances, and improve the efficiency of control systems.

Q: What is a DL type heat meter sensor?

A: A DL heat meter sensor is a device used to measure the flow and temperature of heat medium (water, steam, etc.) and calculate heat consumption. It is usually integrated with a flow sensor and a temperature sensor. It is suitable for central heating, central air conditioning, industrial heat energy metering and other scenarios, and has high accuracy and reliability.

Q: Why is Pt1000 commonly used in DL type heat meter sensors?

A: The resistance value of Pt1000 thermal resistor is 1000Ω at 0℃, and the resistance temperature coefficient is more sensitive (0.00385Ω/℃), which is suitable for high-precision temperature measurement (within ±0.3℃), especially in low temperature difference (such as 5~10℃) measurement, where the error is smaller.

Q: What are the installation specifications for DL type heat meter sensors?

A: The flow sensor needs to be installed horizontally, with the turbine type having a straight pipe section of ≥10D in front and ≥5D in the back; the ultrasonic type having a straight pipe section of ≥5D in front and ≥3D in the back (D is the pipe diameter). The insertion depth of the temperature sensor needs to reach 1/2~2/3 of the pipe diameter to ensure full contact with the fluid.

Q: How does the DL type heat meter sensor achieve intelligent networking and remote monitoring?

A: Connect to the building automation system (BAS) through M-Bus or wireless communication module, support cloud platform to view flow, temperature, heat data in real time, generate energy consumption curve, and set abnormal alarm (such as low temperature difference, sudden change in flow).

As one of the leading dl type heat meter sensors manufacturers in China, we warmly welcome you to buy dl type heat meter sensors made in China here from our factory. All customized products are with high quality and competitive price.

Heat Meter Temperature Sensors, Surface Temperature Thermometer, Pt1000 Rtd Temperature Sensor