302 two-wire system intelligent temperature transmitter
Smart temperature sensor
Number of views:
•The two-wire system transmitter, which is based on current loop power supply, can effectively reduce the wiring costs and power consumption and enhance the anti-interference ability.
• 4-20mA output with multiple fault message feedback abilities.
•While connecting to the thermal resistance transducer, it has short-circuit and open-circuit monitoring function; while connecting to the thermocouple transducer, it has open-circuit monitoring function.
•By using the 3 built-in operating buttons together with the highlighted LCD display, the parameters of the transmitter can be set locally conveniently.
•The rotatable LCD display enhances the flexibility of transmitter installation and displays the percentage of current measured value in the full scale, current measured value and its unit and the sensor type and the diagnostic messages of transmitter etc.
•The protection level of shell is IP67, which can be applied to the outdoor usage.
• Support all the transducers conforming to IEC751 and IEC584.
302A/B1: Pt100, Pt1000, Cu50, Cu100
302A/B2: S, R, B, K, N, E, J, T, WRe3-25
302A/B3: Pt100, Pt1000, Cu50, Cu100
S, R, B, K, N, E, J, T, WRe3-25
Accept the user’s designation
302A/B1: A two/three/four-wire system thermal
302A/B2: A thermocouple transducer and a thermal resistance transducer (three-wire) can work as the cold junction compensation or set the fixed cold-junction temperature to compensate without connecting to the thermal resistance transducer, or use the built-in thermal resistance transducer of the transmitter to conduct cold junction compensation (The compensation precision will effect the final measurement accuracy.)
302A/B3: adopt the connection mode of 302A/B1
or 302A/B2 according to the needs
Appendix 1: List for the inputted sensor types and accuracies
≤250ms with sensor short-circuit and open-circuit monitoring
Two-wire system 4-20mA
Load resistance Ra
Ra≤(Us-14.7V)/0.024A, Us is the loop voltage
Short circuit: accept the user’s designation (3.5～3.75mA)
Open circuit: accept the user’s designation (21～23mA)
Can be set as 3.2mA or 24mA
Accuracy (Digital measurement accuracy)
See appendix 1: List for the inputted sensor types and accuracies
Analog output accuracy
0.025% full scale
Long term drift
The first year ＜0.2% full scale
See appendix 2: Effects of ambient temperature
Power supply effects
＜0.001% full scale/V
Load impedance effects
＜0.025% full scale/100Ω
Rated operating conditions
-40～85℃ -20～60℃ (Anti-explosion type)
GB/T 17626, Grade 3
Protection grade according to EN 60529
Aluminium die casting
1kg (not including temperature sensor)
See Appendix 3: Dimensional drawing for two-wire system
intelligent temperature transmitter
Cable sealed tube connecting thread
M20×1.5 other threads need to use adapters
Connection of sensor
Display and control
Size of display
℃ or ℉
The 3 buttons of the panel
Between the input and output Ueff = 1 kV, 50 Hz, 1 min
Certificate and licence
Intrinsic safety type
Scan the QR code to read on your phone
We could not find any corresponding parameters, please add them to the properties table
Smart differential pressure flowmeter is a smart flowmeter based on battery-powered low-power Internet of Things technology. It is mainly used for the detection of large-diameter water flow in urban water affairs and municipal pipe networks. It uploads collected water flow data and other information to the cloud server through a wireless remote
There are numerous municipal fire hydrants, scattered installations, destruction of fire hydrants, embezzlement of fire-fighting water, insufficient pressure of fire-fighting pipelines, and other problems. As a result,
WP304D temperature collector adopts MEMS temperature sensor chip to be encapsulated in a specific case. The temperature sensor and the conversion circuit are integrated to form a small special temperature sensor. Its appearance is small and exquisite, the measurement accuracy is high, the reliability is good, the power consumption is low,
Fujian WIDE PLUS Precision Instrument Co., Ltd.
National unified technical service telephone:
ADD：No.16, Xingye West Road, Mawei High-tech Zone,Fuzhou,Fujian China 350015