Wi-Fi Data Logger HMT140

for monitoring temperature, relative humidity, current, voltage & door contacts

The HMT140 data logger is no longer available. We refer you to the VaiNet wireless series of data loggers. 



  • Quick and easy Wi-Fi connectivity to viewLinc monitoring software
  • Connectivity provided through your existing Wi-Fi network
  • Autonomous operation and local alarms ensure alerting capability regardless of network connectivity
  • Local data storage provides continuous fail-safe operation - even during power or network outage
  • Two inputs for voltage, current, contact, temperature or relative humidity
  • Accurate and reliable multi-signal measurements from industry best sensors
  • IP65 (NEMA 4) rated housing is resistant to dust and chemicals
  • Traceable to SI units through national metrology institutes
  • ~ 18-month battery life
  • Optional LCD display

HMT140 Country Approvals:

The HMT1140 Wi-Fi data logger is approved for sale in the following countries:

  • Australia
  • Canada
  • China
  • Japan
  • New Zealand
  • Taiwan
  • The United States

Due to updated regulations (ETSI EN 300 328 V2.2.2a), HMT140 will no longer be available for purchase in the following countries from Aug. 6th, 2021, onwards: EU countries, Iceland, Liechtenstein, Turkey, Norway, Switzerland, and the UK. The regulations do not affect devices already in use.  For alternate wireless data loggers, please see VaiNet RFL100 data loggers, or DL-series data loggers with Wi-Fi port server devices.

Key benefits

Easy to install and relocate

Wireless communication utilizes existing Wi-Fi network and is ideal for facilities without available wired infrastructure and for applications in which measurement points move regularly.

Internal data storage

Onboard memory stores data during a power outage or network downtime so no data is ever lost ensuring gap-free records. The logger’s history is always transmitted to the viewLinc monitoring system once communication is restored.

Interchangeable temperature/RH probes for easy field calibration

The HMP110 digital humidity and temperature probe is field replaceable and contains all calibration details. Monitoring system viewLinc's event log will record any sensor swap-outs, ensuring your audit trail is complete and compliant.