W3745 WiFi Temperature and Relative Humidity Sensor for 4 External probes

Sensors with WiFi interface are designed to measure temperature and relative humidity from connected probe (optional accessories) and to measure the temperature from up to 3 connected Pt1000 probes (optional accessories).

Communication with the sensor is done via a wireless WiFi network. The device allows sending measured values ​​to the online COMET Cloud (with the shortest interval of 5 minutes) or into COMET Database. The values ​​can be displayed on integrated web pages and provided to third party systems using the Modbus TCP, SNMP, JSON and XML. The measured values ​​are displayed on the LCD display.

The device continuously evaluates the alarm limits of the measured values ​​and in case of exceeding them, it can send an e-mail or inform by means of acoustic or optical signaling. Two alarm limits are supported for each measurement channel.

The main advantage of sensors with WiFi interface is the simplicity of deployment in places where WiFi infrastructure is already available. Just place the sensor in the desired location and connect it to the WiFi network. WiFi sensor in conjunction with COMET Cloud offers a comprehensive solution for monitoring and alarm without the need for a server solution on the part of the user. If necessary, however, the sensor can also be connected to third-party systems, either using the Modbus TCP protocol, SNMP protocol or by sending JSON data to an http server. Sensor allow to provide values via XML and JSON using HTTP GET requests as well.

Thanks to these unique features, the WiFi sensor will find applications and a wide range of application areas.

Technical data

Measured value
Temperature
Relative humidity
Counted values (dew point…)

TEMPERATURE SENSOR

• Measuring range according to the connected probe Digi/E
• Accuracy according to the connected probe Digi/E
• Resolution 0.1 °C

HUMIDITY SENSOR

• Measuring range according to the connected probe Digi/E
• Accuracy according to the connected probe Digi/E
• Resolution 0.1% RH
• TEMPERATURE SENSOR - external probe Pt1000
• Measuring range -90 to +260 °C (optionally -150 to +600°C)
• Accuracy ±0.2 °C in the range -90 to +100 °C; ±0.2 % from reading from +100 to +260 °C
• Resolution 0.1 °C
  

DEW POINT

• Measuring range according to the connected probe Digi/E
• Accuracy according to the connected probe Digi/E
• Resolution 0.1 °C

GENERAL TECHNICAL DATA

• Operating temperature -30 to +60 °C
• Channels 1x connectable temperature+humidity probe (ELKA connector); 3x connectable Pt1000 temperature probe (CINCH conektor)
• Measuring interval 1 s
• Sending interval to COMET Cloud adjustable 5 minutes to 12 hours
• Communication protocols HTTP(S), SMTP, ModbusTCP, SNMP (v1, v2c, v3), HTTP POST, HTTP GET (JSON, XML)
• Alarm signalization e-mail, acoustic, LED
• Power 5.0 to 5.4 VDC; consumption 150 mA (max. 500 mA); USB-C connector
• Radio section frequency: 2.4 GHz; max. transmit power: 18 dBm; standard: IEEE 802.11 b/g/n
• WiFi security Open, WEP, WPA, WPA2, WPA2-PMF, WPA3, WPA2-EAP
• Protection class IP30
• Dimensions 133 x 93 x 32 mm
• Weight 117 g
• Warranty 3 years