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SD-4-20mA Wireless Environmental Monitors with Analog Input with WiFi Connectivity

Free Cloud Software
SensDesk Groups
SensDesk Grouped Devices
SensDesk Graph Function
SensDesk Dashboard
SKU: SD-4-20MA
Prices from £157.41 inc. VAT or £188.89 ex. VAT
Prices from £188.89 inc. VAT
Prices from £157.41 ex. VAT
Total price delivered from £166.36 ex. VAT or £199.63 inc. VAT
Total price delivered from £199.63 inc. VAT
Total price delivered from £166.36 ex. VAT
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The SD-4-20mA is an IoT remote monitoring unit with 1x AI (Analog Input) for an external 4-20mA / 0-20mA probe. The external 4-20mA probe is powered from the device. The SD-4-20mA can be powered by an external 5Vdc power supply or via PoE. The SD-40-20mA can be connected to the local area network via a built-in Ethernet port or Wi-Fi connectivity.

For configuration the SD-4-20mA has a built-in web server and WiFi connectivity and the device can be remotely monitored over the internet using the HWg Cloud or SensDesk portals or SensDesk Mobile App (iOS or Android). The portals can be configured to send email alerts to a distribution list when there is a sensor alarm. Text messages (SMS) can also be sent via HWg-Cloud or SensDesk using an email-to-SMS text service.

AI (Analog Input) for Common Industrial Analog Probes and Sensors

AI (Analog Input) with 4-20mA is one of the most popular interfaces for external industrial probes and sensors. Many industrial probes with the 4-20mA (0-20mA) analog interface are available. The SD-4-20mA IoT Monitoring device is a ‘converter’ to connecting the measured analog values to the SensDesk portal.

Converted calibration

Each AI (Analog Input) has to be adjusted (configured) together with a connected probe. The instalaltion is one sensor unit with one probe only. The conversion curve, measurement units and external probe parameters should be configured locally before the SD-4-20mA device with connected external probe is sent to the site.

SD-2-4-20mA Set Kit

The SD-2-4-20mA is supplied with a power adapter.

Key Features

  • Analog Input can be reconfigured from 4-20 mA (default) to 0-20mA
  • Wired Ethernet and WiFi: 802.11 b/g/n (2.4GHz)
  • Support for simultaneous Ethernet and WiFi operations
  • Power: 5Vdc or PoE
  • Simple installation and supports DHCP
  • Embedded WEB server
  • Security protected with a password
  • Works with the SensDesk Cloud portal


  • AI (Analog Input) to connect special industrial analog probes (sensor) to the portal
  • Connecting 4-20mA probe for liquid level monitoring in diesel or water tanks
  • Connecting 4-20mA probe for Water pH, pressure or level probes
  • Industrial applications

Physical Installation

  • Metal Case: IP40
  • Installation: Wall
  • Design: Industrial environments

Operation Schematic

Sensdesk with SD 4-20mA Installation