Wall-mounted Temperature and Humidity Transmitter NKWS19 Series

Principle and Structure

The NKWS19 series wall-mounted temperature and humidity transmitters are meticulously designed with excellent quality, suitable for indoor temperature and humidity monitoring in various occasions. The temperature range is adjustable, with two options of with display and without display, and it boasts extremely high cost performance.

Measuring Range

• Temperature: -40～0～125℃
• Humidity: 0-100%RH (relative humidity)

Output

RS485, 4-20mA, 0-10VDC

Power Supply

12～24VDC, 24VDC

Product Applications

Suitable for various indoor environment temperature and humidity measurement, planting and breeding, hospital wards, clean rooms, heating, ventilation and air conditioning, etc.

Product Features

• a) Excellent long-term stability and full-range temperature compensation
• b) Wide operating temperature range
• c) Multiple parameter options for temperature range
• d) Convenient installation, available for wall mounting/rail mounting
• e) High dust resistance rating
• f) LCD display

Output and Power Supply

Maximum Power

Technical Parameters

• Measuring medium: Gas (compatible with contact materials)
• Temperature range: -40~0~125°C
• Humidity range: 0-100%RH (relative humidity)
• Overall weight: Approximately 160g with display; approximately 138g without display
• Electrical protection: Short-circuit protection: Permanent; Reverse protection: None; Insulation resistance: ≥100MΩ at 500VDC; Insulation strength: 500VAC
• Stability: ±1%RH FS/year; ±0.2°C/year
• Response frequency: –
• Environmental conditions: Ambient temperature: -40~85°C; Ambient humidity: 0%~95%RH
• Overall material: Main housing: ABS engineering plastic (in contact with the measured medium); Filter: Polyethylene (density 50μm, in contact with the measured medium); Cable gland: Nylon (wire locking diameter 4~6mm, in contact with the measured medium); Display: LCD with backlight; Sealing element: Nitrile rubber (in contact with the measured medium)
• Temperature error: ΔT ±1.6 (°C)
• Typical temperature deviation: ±1.2, ±0.8, ±0.4, ±0.0 (at temperatures of -40, -20, 0, 20, 40, 60, 80, 100, 125°C)
• Humidity error: ΔRH (at 25°C, maximum RH deviation: ±5, ±3, ±0 at relative humidity of 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100%RH)
• Protection rating: IP65
• Response speed: Temperature with a step of 10°C, humidity with a step of 10%RH, gas flow rate of 0.1m/s
• Load characteristics: Voltage type: ≥100kΩ; Current type: ≤200Ω

Wiring Diagram

• Current output wiring diagram (three-wire system)
• Voltage output wiring diagram (three-wire system)
• RS485 (digital signal) output wiring diagram (four-wire system)

ER ER ER

G Blue wire (V-) G Blue wire (V-) G Blue wire (V-) Power supply (VDC) U

V24 Red wire (V+) V24 Red wire (V+) U V24 Red wire (V+) Acquisition device

TO White wire (temperature) Power supply/(VBC) TO White wire (temperature) Power supply (VDC) A Yellow wire (A) PC

“0” represents the shielded wire, and all marked grounding points must be effectively grounded. It is recommended to use shielded twisted-pair signal cables for the best effect. To avoid ground loops, the shield layer should be grounded at one end, insulated and floating at the transmitter end, and grounded at the control cabinet end.

Selection Table

For example: NKWS19-X-A1-G4 (CWS19 type temperature and humidity transmitter, with display, 4-20mA output, 12~24VDC power supply)

Note: The default humidity range is 0~100%RH. Please refer to Note 1 for the temperature range.

Note 1: The temperature range of digital output is -40~125°C, corresponding to the output data of 0-1650.

The temperature ranges of current output and voltage output can be arbitrarily switched through the DIP switches on the internal circuit board, with a total of eight ranges available. The default temperature range at the factory is -40~100°C.

Wholesale of Wall-mounted Temperature and Humidity Transmitter NKWS19 Series

Shanghai Zanke is a wholesale manufacturer of the wall-mounted temperature and humidity transmitter NKWS19 series. At this stage, the main products of Shanghai Zanke Company include flow switches, pressure switches, temperature switches, electromagnetic flowmeters, vortex flowmeters, turbine flowmeters, ultrasonic flowmeters, material (liquid) level flowmeters and other instruments. Application industries: petroleum chemical industry, natural gas, machinery, electric power, metallurgy, building materials, food and pharmaceutical manufacturing, agriculture, environmental protection, etc. (Our company can customize instrument specifications according to users’ special requirements and on-site working conditions, and provide installation and commissioning services.)

Well, that’s all for today’s introduction to the working principle, application fields, characteristics, installation requirements, use and maintenance of the wall-mounted temperature and humidity transmitter NKWS19 series. If you have any other questions, please feel free to contact us, and we will reply to you as soon as possible after receiving your inquiry.