WiFi Dual Channel Data Logger with Thermocouples

Part No: RF314Dual (4808985)

£230.95 (ex. VAT)

The RF314Dual WiFi Dual Channel Data Logger with Thermocouples provides dual channel recording through two external thermocouple probes.

  • Temperature Measurement Range: -270°C to +1300°C / -454°F to +2372°F
  • Plug & Play Installation using existing WiFi Network
  • Supplied with two removable 3m Thermocouple Probes and Micro USB lead and Wall Bracket
  • Warranty: 1 Year


RF314Dual WiFi Dual Channel Data Logger with Thermocouples

WiFi Dual Channel Data Logger with Thermocouples

The RF314Dual WiFi Dual Channel Data Logger with Thermocouples provides dual channel recording through two external thermocouple probes.

The RF314Dual data logger measures the temperature of the environment in which the probes are situated. This data logger is typically accurate to ±1.5°C (with the K type probes supplied). It is freestanding, but can be attached to a wall or surface using the bracket provided and can be clipped in and out as required. The probes are connected using the industry standard miniature thermocouple connector, which allows alternative K, N, J and T type probes to be used.

The Thermocouples can be used in a wide range of extreme temperature situations e.g. manufacturing processes, cold storage and hot storage.

Data is streamed wirelessly to either the Comark Cloud or a local PC. During configuration the data logger will search for an existing wireless network whilst physically connected to the PC. Once connected it can then be placed anywhere within range of the network. If the data logger temporarily loses connectivity with the network or PC, it will log readings until the connection is re-established (max 30 days at 10 second sample interval).

Although the Diligence WiFi data loggers have an impressive range this can be increased by using WiFi extenders.

The RF314Dual WiFi Dual Channel Data Logger with two Thermocouple Probes, is a low power device containing a rechargeable battery. When configured, the data logger can operate for up to six months*. The battery can be recharged via a standard +5V wall adapter RF320 (UK/US) or a USB port using the cable provided.

*Please refer to specification for details

The LCD display includes several features including Max and Min readings and indicators for battery state, alarms, WiFi connection and signal strength.

With our free PC software you can choose to store your logger data either locally on a single PC, or make it universally accessible on the Comark Cloud. Whichever you choose, you’ll be able to analyse data, draw graphs and export the latest and historic data in various formats.


You can change the data logger’s settings to suit your needs, options include:

  • Assigning names to the data logger and each measuring channel.
  • Selecting the units of measurement.
  • Choosing the sample rate and transmission period.
  • Setting high and low alarm levels for each channel.

Once configured, data logger settings can be changed remotely, without the need to reconnect it to your PC. The RF314Dual has a protection rating of IP40 and the probes IP67. The data logger is IEEE 802.11b/g/n compliant, supports WEP, WPA/WPA2 encryption and enterprise networks**.

*Please refer to specification for details


  • Dual channel recording through two external thermocouple probes
  • Wirelessly stream and view data on the Comark Cloud or on a PC
  • Data Logger set up is easy using our free PC software
  • View and analyze multiple sensors, including graphing of historic data
  • Measures temperature range -270°C to +1300°C / -454°F to +2372°F (probe dependent)
  • Configurable high and low alarms with indicator
  • Data Logger memory stores data even if WiFi is temporarily disconnected

*Battery Life and Power Supply

The product will arrive partly charged, but ideally you should charge it for 24 hours before use for optimum performance. The battery can be recharged (unit must be between 0°C to +40°C / +32°F to 104°F) via a PC, a USB +5V wall adapter RF320 (UK/US), or a portable USB battery pack using the USB lead provided. It can also be permanently powered by the RF320 USB wall adapter. Readings may be affected while the internal battery is being charged. However, once charged, continued connection of the charger will have no effect.

Battery life is dependent on: transmission period, WiFi encryption method, WiFi encryption key rotation frequency (determined by the router/access point), signal strength between router/access point and WiFi device, presence volume and type of WiFi traffic from other devices, sample rate and operating temperature.

For more information on Battery and WiFi Considerations please read our Product Information Bulletin for RF300.

Please contact us if you want more information on the battery life of RF300 Transmitters and how to maximise it.
Apply for your Comark Cloud Account

Upgraded WiFi Loggers (July 2016)

Comark has upgraded the Diligence WiFi Data Logger range from ‘B’ (IEEE 802.11b) to ‘BGN’ (IEEE 802.11b/g/n) WiFi compatibility.

One of the major benefits of the switch to type ‘BGN’ WiFi is that it speeds network communications. IT departments in many schools and hospitals have been turning off ‘B’ compatibility to improve network speeds, so ‘BGN’ devices are often all that they will consider for new network devices.

Plus there are a number of other improvements to the Loggers:

New LCD on all Loggers

RF300 loggers now have a new two-Line LCD and a new LCD surround. The new segment battery indicator shows the charge on the battery all the time.

Improved Display Resolution

RF313-TH WiFi Temperature and Humidity Data Logger now shows temperature to 0.1°C & 0.1°F.
RF314-TC WiFi Temperature Data Logger with Thermocouple Probe now shows temperature to 0.1°C above 1000°C and below -100°C

How do I tell them apart from the old versions?

Telling them apart is straightforward. The part number for the logger can be found on the rear of the logger along with the MAC Address which, for all ‘BGN’ enabled products is 98:8B:AD:20:00:00 -> 98:8B:AD:2F:FF:FF

Still have questions or need advice?

Please contact us.



Technical Specifications

Sensor TypeThermocouple
Battery LifeTypically *3-6 Months
USB Supply Voltage (Typical)4.5 to 5.5 Vdc
Temperature Measurement Range-270°C to +1300°C / -454°F to +2372°F
Operating Temperature Range-20°C to +60°C / -4°F to +140°F
Temperature Measurement Resolution0.01°C / 0.01°F
Temperature Display Resolution0.01°C / 0.01°F
Logging Period (User Configurable)10 seconds to 12 hours (Typical 10 minutes)
Transmission Period (User Configurable)1 minute to 24 hours (Typical 1 hour)
Logger DimensionsHeight 82mm / 4" x Width 70mm / 3" x Depth 36mm / 1"
WiFi ComplianceIEEE 802.11b/g/n compliant, supports WEP, WPA/WPA2 encryption and enterprise networks (MS-CHAPv2, PEAP, EAP-FAST, EAP-TTLS)
Supported ProbesK,N, J and T Type Probes with 2-Pin Sub Miniature Connector
Supplied Probe Dimensions1.5m Cable, 75mm x 5mm Shaft
Supplied Probe Measurement Range-40°C to +200°C / -40°F to +392°F
Supplied Probe Accuracy+/-2.5°C
Warranty1 Year

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