Domestic ones are almost the same, the quality is better, the imported ones are better, and the imported prices are also better.
Thermal resistance temperature transmitter Shanghai Menghui
It consists of a reference unit, R/V conversion unit, linear circuit, reverse connection protection, current limiting protection, V/I conversion unit, etc. composition. After the temperature measurement thermal resistance signal is converted and amplified, the nonlinear relationship between temperature and resistance is compensated by a linear circuit. After passing through the V/I conversion circuit, a 4-20mA constant current signal that is linearly related to the measured temperature is output.
Thermal resistance temperature transmitter Shanghai Menghui
It consists of a reference unit, R/V conversion unit, linear circuit, reverse connection protection, current limiting protection, V/I conversion unit, etc. composition. After the temperature measurement thermal resistance signal is converted and amplified, the nonlinear relationship between temperature and resistance is compensated by a linear circuit. After passing through the V/I conversion circuit, a 4-20mA constant current signal that is linearly related to the measured temperature is output.
Main features
Analog type features
● High accuracy
● Range and zero point are externally continuously adjustable
● Good stability
● Positive migration can reach 500% and negative migration can reach 600%
●Two-wire system
●Damping is adjustable and over-resistant Pressure
● Solid sensor design
● No mechanical moving parts, less maintenance
● Light weight (2.4kg)
● The whole series has a unified structure and strong interchangeability
● Miniaturization (166mm total height)
● Diaphragm materials in contact with the medium are optional
● Single Edge resistance to overpressure
● Low-pressure cast aluminum alloy shell
Intelligent features:
●Super measurement performance, used for pressure, differential pressure, liquid Bit, flow measurement
●Digital accuracy: +(-)0.05%
●Analog accuracy: +(-)0.75%+(-)0.1%F.S
< p>●Full performance: + (-) 0.25F.S●Stability: 0.25% 60 months
●Turndown ratio: 100:1
● Measuring rate: 0.2S
●Miniature (2.4kg) all-stainless steel flange, easy to install
●The process connection is compatible with other products to achieve the best measurement
< p>●The world's only sensor using H alloy sheath (patented technology), achieving excellent cold and thermal stability●Smart transmitter using a 16-bit computer
●Standard 4-20mA, with digital signal based on HART protocol, remote control
●Supports upgrades to fieldbus and field control-based technologies.
System composition
The structure of the thermal resistance temperature transmitter can be roughly divided into three parts: input bridge, amplifier circuit and feedback circuit. Its input bridge is essentially an unbalanced bridge. The thermal resistor is connected to one of the bridge arms. When the resistance of the thermal resistor changes due to temperature changes, the bridge outputs an unbalanced voltage signal. This voltage signal passes through the amplifier circuit and feedback circuit to obtain an input signal. The output current I is a linear function.
Temperature transmitter Shanghai Menghui.