PST Air Probe Duplex

PST Air Probe Duplex (2x2m Lead)

Part No: SRF600 THP 2M 2S

The PST Air Probe Duplex is a damped, dual air probe with a 2.0m lead for use with SRF Wireless Transmitters. 

  • Temperature Range: -40 to +70°C / -40°F to +158°F
  • Sensor Type: PST (Thermistor)
  • Connector Type: Lumberg (6-Pin)
  • Warranty: 1 Year
  • Compatible with SRF612

PST Air Probe Duplex (2x2m Lead)

The PST Air Probe Duplex is a damped, dual air probe for use with SRF600 Wireless Transmitters. Each probe is connected to a 2.0m lead.


The PST Air Probe Duplex is fitted with a 6-Pin Lumberg connector with a locking screw, to provide a strong and secure probe-to-instrument connection with better prevention of liquid ingress.

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 Setra Air Probes for SRF600 are inherently designed to be slow. Why is this? Read on to find out….

We supply a Damped Air Probe style for the SRF600 Wireless Transmitters, 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 a Damped 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 temperature of samples in the fridge or freezer. The SRF600 Wireless Transmitters are your early warning notification for any alarms, it would be unsuitable if ‘false alarms’ were constantly being raised.


Technical Specifications

Name Value
Lead Length 2 x 2.0m
Connector Type Lumberg
Lead Material PVA
Air Probe Stem Length 30mm
Air Probe Stem Diameter 8mm
Air Probe Stem Material Stainless Steel
Temperature Range -40 to +70°C / -40°F to +158°F
Wire Type Flat-Twin
Sensor Type PST (Thermistor)
Warranty 1 Year