RH Adapters

RH Adapter

RH Adapter

Model: CTA-21
Price: $23.00
RH Depth Adapter

RH Depth Adapter

Model: CTA-25
Price: $6.00

RH Adapters are used to connect RH BluePeg Probes to Tec RH Meters for use as hand-held thermo-hygrometers for ambient temperature and relative humidity readings.

CTA-21 RH Adapter is a double-ended 3.5mm male connector plug. This adapter is available as an individual product and also included in CT-50 and CT-51 Concrete Humidity Measurement Kits.

CTA-25 RH Depth Adapter is a 3.5mm male/female connector that extends the length of a probe by 2in (51mm). This allows easy cable connection in holes over 2.4in (61mm) when CTA-20 Extra Long Sleeves are used.


  • CTA-21 adapts BluePeg Probes for direct temperature and relative readings in open air
  • CTA-25 extends probe length by 2in for thicker slabs

Included Items:

  • CTA-21 RH Adapter, or
    CTA-25 RH Depth Adapter
Size 3.5mm
Estimated Shipping Weight 2.0lb (0.91kg)

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Size 3.5mm
Estimated Shipping Weight 2.0lb (0.91kg)