RF312 Dual Plus Dual Channel Diligence WiFi Data Logger


The RF312 Dual Plus Diligence WiFi Dual Channel Data Logger with removable High Accuracy Specification Thermistor Probes can measure two Air or Product Temperatures with a single logger. 

The two probes can measure the environment in which they are situated e.g. one could measure a refrigerator and the other could measure a freezer. This high accuracy data logger is accurate to ±0.2°C* (-15°C to +80°C) / ±0.4°F (+5°F to +176°F). The unit comes with a bracket that can be used to mount the data logger on a wall or surface. The probes are connected to the Data Logger via a 160mm Y splitter cable which is provided. (*Using the supplied Penetration/Air Probe).

Note: The Logger is supplied with two multipurpose test probes. This logger is compatible with the regular RFAXxxxJ probes with the following accuracy specifications ±0.3°C (0°C to +70°C) / ±0.6°F (+32°F to +158°F), please see list of compatible probes below.

Data is streamed wirelessly to either the Comark Cloud or a local PC. If the data logger temporarily loses connectivity with the network, it will log readings until the connection is re-established (max 30 days at 10 second sample interval).

The Comark Cloud Dashboard is your new online Home for your Loggers and provides easy access to the critical information regards your system, including; the status of your favourite devices at a glance, review recent device events, view data and clear alerts, quickly navigate to the detail on all your devices.

Simply log on to the Comark Cloud Dashboard via your PC, or Tablet & Phone App.

You must first Register with Comark and Create a Cloud Account via their website you will find the link below. You may then setup your loggers quickly and easily with the free with the App (Recommended) or PC software.

Comark Cloud Account Annual Subscription is required with Each RF300 Device.
It is advised to consider where savings may be made using Dual Devies
Purchase the required number of Cloud Account Subscription here

Set up, data logging and data review. Set up features will include data logger name, °C/°F, sample rate, and high/low alarms. 

RF312 Dual Plus;

  • Temperature range: -40°C to +125°C / -40°F to +257°F
  • Simple installation using your existing WiFi network
  • Supplied with removable thermistor probes, micro USB lead and wall bracket
  • Comark Cloud charges apply
  • Warranty: 1 Year

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

    The RF312DualPlus WiFi Dual Channel Data Logger with two 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.

    The LCD display includes several features including Max and Min readings and indicators for battery state, alarms, RF312 connection and signal strength.

    From the Comark Cloud Dashboard 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
    •Manage Users and Locations

    Enjoy an Audit Trail, with detailed reporting, data exporting and notification options, including e-mails and SMS**

    The RF312DualPlus has a protection rating of IP43 and the probes IP67. The data logger is IEEE 802.11b/g/n compliant, supports WEP, WPA/WPA2 encryption and enterprise networks***.


    **SMS via E-mail to SMS service such as TextMagic™ (www.textmagic.com)

    •Measurement range -40°C to +125°C / -40°F to +257°F
    •Wirelessly stream and view data on the Comark Cloud
    •Initial set-up of the data loggers via the free, easy-to-use PC software application
    •View and analyze multiple sensors, including graphing of historic data
    •Configurable high and low alarms with indicator
    •Capable of logging greater than 1 million data entries
    •Sensor stores all data even if WiFi is temporarily disconnected
    •Fully featured LCD display
    •Simple, single button operation
    •Low battery indicator
    •WiFi connection indicator
    •USB port used for recharging (can only be recharged when the unit is between 0 to +40°C / +32 to +104°F)
    •Supplied with removable High Accuracy thermistor probes, micro USB lead and Wall Bracket

    *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.

    NOTE; Cloud Account Application opens a new browser window to www.comarkinstruments.net 

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    Technical Specifications

    Sensor TypeHigh Accuracy 'Plus' Specification Thermistor
    Battery LifeTypically *3-6 Months
    USB Supply Voltage (Typical)4.5 to 5.5 Vdc
    Temperature Measurement Range-40°C to +125°C / -40°F to +257°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
    Temperature Accuracy±0.2°C (-15°C to +80°C) / ±0.4°F (+5°F to +176°F)
    ±0.6°C (-40°C to +125°C) / ±1.2°F (-40°F to +257°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)
    Supplied Probe Dimensions3m Cable, 75mm x 5mm Shaft
    Warranty1 Year

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