Product Details
Smart 4-20mA Head Mounted Temperature Transmitter with Universal
Input
Instruction
WNK621 4~20mA two-wire integrated circuit board is specifically
designed for intelligent temperature transmitters. With
microprocessor as the core of its highly-integrated circuit, it
reliably achieves thermal resistance/thermocouple signal
acquisition, processing and loop output, and also provides single
bus digital interface and dedicated configurator to achieve full
digital debugging and calibrating. it particularly well-suited for
producing and manufacturing two-wire intelligent temperature
transmitters.
Features
- Two-wire work mode
- Pt100,Cu50,Cu100, Pt1000 Four thermal resistance full measurement
range
- K, S, R, B, N, E, J, T Eight thermocouples full range measurement
- Cold end automatic compensation
- Thermal resistance three-wire measurement automatically eliminating
the lead resistance
- Thermal resistance/ Thermocouple disconnection fault prompts and
output processing;
- Independent setting for temperature transmission output range
- High accuracy, low temperature drift
- Single wire communication interface, dedicated configurator
debugging
- Unique output migration, reverse function
- Highly integrated, Anti-jamming design and Hardware and Software
watchdog
Technical Data
Power supply: | DC 8~36V( Recommend DC 24V ) |
Signal Range: | Pt100 (-200~650℃) Pt1000 (-50~300℃) |
Cu50 (-50~150℃) Cu100 (-50~150℃) |
K(-250~1300℃),S(-50~1700℃) |
R(-50~1700℃), B(0~1800℃) |
N(-250~1000℃),E(-250~800℃) |
J(-200~1100℃),T(-250~400℃) |
±20mV,±60mV(Linear voltage,Resolution 0.002mV) |
±500.0mV(Linear voltage,Resolution 0.1mV) |
R400(0~400Ω Linear resistance,Resolution 0.01Ω) |
R2000(0~2000Ω Linear resistance,Resolution 0.1Ω) |
Temperature resolution: | Thermocouple 0.1℃(Measuring and Transmitting) / Thermal Resistance
0.01℃(Measuring and Transmitting) |
Sampling Rate: | 5 times/second |
Current output resolution: | 2uA |
Output accuracy | ±0.2% |
Temperature drift: | <50ppm/℃ |
Operating temperature: | Temperature-20~+80℃ Humidity <85%RH. |
Power Consumption: | Less than 0.2W |
Dimension: | Diameter 44mm,Height 20mm,Mounting hole 33~36mm |
Company Profile
Hefei WNK Smart Technology Co.,Ltd
Founded in 2004, HEFEI WNK SMART TECHNOLOGY CO., LTD is a
hi-tech company specializing in different kinds of
technologically-advanced and good quality sensor, transmitter and
automation instrument. We devote to developing, manufacturing and
selling of automation control system, providing our customers
comprehensive fieldbus technical solutions and factory
informatization construction.

Our main products include iEOS industrial cloud data base
developing plate form; industrial Internet of Things; WNK-WMS
industrial wireless measurement system; onsite measurement
instruments like temperature, pressure, flow, level sensor and
transmitter etc, widely applied in Petrochemical, Chemical, Power,
Steel and Cement.

WNK is the third company in China developed PROFIBUS transmitters.
WNK series PROFIBUS transmitter is the fourth in China certificated
by international PROFIBUS organization, and Chinese first that
completely having proprietary intellectual property rights. WNK
PROFIBUS-PA temperature transmitters filled Chinese blank
technology in the field.

With strict, scientific management system, WNK has been
certificated to conform to standard GB/T 19001-2008 / ISO 9001:2008
by CHINA CLASSIFICATION SOCIETY CERTIFICATION COMPANY. WNK commits
to developing of new products and technical innovation. With
continuously effort in advanced technology of automation control
system, WNK has been undertaking some innovation projects of MST
(Ministry of Science and Technology), and has been honored as
promising enterprise of “Giant of Technology ”in Hefei Hi-tech
Industry Development Zone.

As Chinese first and unique qualified production enterprise of
0.075% measurement in Anhui, WNK brand was awarded Anhui Famous
Brand.
