Diligence WiFi Air Probe Plus (2m Lead)

Part No: RFAX200JPLUS (4380284)

The RFAX200J Diligence WiFi Air Probe Plus is a damped (High Accuracy ‘Plus’ Specification Thermistor) air probe for use with the RF312-TP Diligence WiFi Temperature Data Logger.

  • Temperature Range: -40°F to +158°F / -40°C to +70°C
  • Sensor Type: PST (Thermistor)
  • Connector Type: 3.5mm Jack Plug
  • Warranty: 6 Months

Diligence WiFi Air Probe Plus

The RFAX200JPLUS Diligence WiFi Air Probe Plus is a damped (High Accuracy ‘Plus’ Specification Thermistor) air probe for use with the RF312GLYCOL and RF312DUALPLUS Diligence WiFi Temperature Data Loggers only. The probe is connected to a 2.0m lead.




The RFAX200JPLUS Diligence WiFi Air Probe Plus is fitted with a 3.5mm Jack Plug connector, to provide a quick and easy connection to your Data Logger.

Air Probes Explained

It is fair to say, that any probe that can measure temperature, could be used as an Air Probe, with varying degrees of success. However, Air Probes are specifically designed for this purpose and so have a higher degree of accuracy and response.

Air Probes are often designed to be very quick response with a low thermal mass. The sensor is designed to be as small as possible so that the air temperature is transferred to the probe with minimal temperature loss or gain to maintain a high degree of accuracy.

That said, all Comark Air Probes for the RF312xxx Diligence WiFi Temperature Data Loggers are inherently designed to be slow. Why is this? Read on to find out….

We supply a Damped Air Probe style for the RF312xxx Diligence WiFi Temperature Data Loggers, which comes in the form of a small stainless steel bullet shaped end, see picture.



This type of construction has two purposes;

  • It protects the sensor from physical damage
  • It slows the response of the probe down significantly

In certain scenarios, it is beneficial to have a slower response to changes in air temperature, hence having aDamped Air Probe. For example, when you place a probe inside a fridge or freezer, you probably don’t want an alarm going off every time someone opens the door.

The Damped Air Probes do a good job of reflecting the samples in the fridge. As the RF312xxx Diligence WiFi Temperature Data Loggers areyour early warning notification for any alarms, it would be unsuitable if ‘false alarms’ were constantly being raised.

All RF300 Diligence WiFi System Air Probes are fitted with a 3.5mm Jack Plug Connector and a stainless steel Damped Air Probe end, as shown below.

RF Alarm Output JackDamped Air Probe Tip

Technical Specifications

Lead Length2.0m
Connector Type3.5mm Jack Plug
Sensor TypePST (High Accuracy 'Plus' Specification Thermistor)
Stem Length30mm
Stem Diameter8mm
Temperature Range-40°C to +70°C / -40°F to +158°F
System Accuracy with Comark Thermometer±0.5°C -20°C to +70°C / ±0.9°F -4°F to +158°F
Wire TypeFlat-Twin
Lead MaterialPVA
Warranty6 Months

Articles / FAQs

General Care of Temperature Probes

General Care of Temperature Probes

The Probe is where most of the action with any Thermometer takes place. Almost every operation requires a Probe reading.  The Probe should be treated with care in order to ensure best functioning and long life.

We would recommend that you always have a spare, properly functioning Probe on hand, just in case the primary Probe breaks, or appears to be reading incorrectly.

You should not stretch the coiled cable of any Probe, to reach an item to be measured. We would recommend instead that you ALWAYS move BOTH the Probe and the Thermometer, toward the food to be measured. This will help avoid unnecessary stress on the wires inside the Probe.

You should not touch the coiled cable or Probe handle to hot surfaces, that might melt the protective coatings, which in turn could damage the Probe wires and render the Probe inoperable.

You should not bend the tip of any Penetration Probe, as this too could break the wires and render the Probe inoperable. In general, Penetration Probes are designed for penetrating thawed food only and not for testing frozen food or containers or chipping ice.


You should clean the Probe and wire coil with a clean damp cloth, being VERY careful not to pull or stretch the coil and damage the wires inside.

20th April 2015