Xizheng brand integrated explosion-proof high-precision digital temperature transmitter

Xizheng brand integrated explosion-proof high-precision digital temperature transmitter

I. Overview

Integrated thermocouple temperature sensorSensor is a contact type temperature measurement instrument used in the field, which has good electromagnetic compatibility, anti-interference performance, and output protection

Function, usually used in conjunction with its corresponding secondary instrument or computer acquisition measurement system, can accurately measure various media or objects from -200 ℃ to 1600 ℃

Temperature.

This series of products refers to and complies with relevant GB standards, JJG regulations, and IEC related document standards, and optimizes based on the advantages of similar products at home and abroad

Design to make the entire product more reliable and accurate, very suitable for temperature measurement in various on-site environments.

2、 Basic structure

1. Basic structure: Connection device+junction box+protective tube+(sensor+transmission module)

2. Length representation: L=total length of protective tube/insertion length (unit: mm, insertion length below the sealing surface).

(Cold end length: a. Reduce conduction and radiation temperatures, protect module circuits, terminals, and cables; Stabilize the temperature field at the reference end of the thermocouple.

b. The length of the cold end is generally 150mm; For temperature measurements below 120 ℃, the cold end length can be 100mm or 50mm.

c. For temperature measurements above 250 ℃, consider the impact of temperature on the cold end and extend it appropriately, such as 250mm or 300mm. ）

3. Process connection: various threads, movable threads, flanges, movable flanges, etc.

4. Junction box: waterproof and explosion-proof Ex d Ⅱ BT4, with a shell protection level of IP65

5. Protective pipe: The selection of pipe diameter should consider structural strength, thermal response time, and maintainability; The temperature resistance, mechanical strength, and chemical properties of the material.

Products with a protective tube diameter ≤ 8mm should not be used in situations with flow rate, agitation, or pressure; (Armor type is bendable, relatively shock resistant, and pressure resistant)

Common materials include stainless steel lCr18Ni9Ti; High alumina ceramic tubes and steel jade ceramic tubes are used for medium and high temperature applications.

We can order protective sleeves with various structures and special materials (such as high temperature, high pressure, wear resistance, chemical corrosion resistance, etc.).

6. Sensors: Sensors are consumables, and high temperatures and vibrations can affect their lifespan and product reliability. (Sensor Armored Type Compared to Component Type Seismic Resistance)

3、 Technical parameters

1. Standard signal output (integrated transmitter)

Code output accuracy, power supply load

A 4-20mA DC two-wire system 0.5% 0.2% * 24V DC ≥ 650 Ω

V 0~10V DC three wire system 0.5% 24V DC 2K Ω~200K Ω

RS485 communication (MODBUS RTU) 0.5% 0.2% * 24V DC 64 points

The manufacturing department determines the sensors used inside the product based on the range, accuracy, and usage environment required by the user.

Generally, products with an accuracy of 0.5% are supplied, and products requiring an accuracy of 0.2% should be specified when ordering. *

Built in transmission module related performance circuit overall encapsulation and solidification: suitable for humid, salt spray, dust, corrosive, and vibrating environments

Power supply: 12-32VDC Accuracy: 0.2% 0.05% * Circuit temperature drift: ± 0.005%/℃

Operating environment temperature: -30 ℃~85 ℃ Operating relative humidity: 5% RH~85% RH

Polarity protection, anti overcurrent, anti overvoltage, anti surge, anti electromagnetic interference intrinsic safety Ex iaIICT4*

Output protection and sensor abnormality detection function: When the sensor is open circuited, the output is greater than 23 mA and less than 25 mA; when the sensor is short circuited, the output is ≤ 3.8 mA

Xizheng brand integrated explosion-proof high-precision digital temperature transmitter