Automess - Model 6150AD 18 -Low Dose Rate GM Gamma Probe

• Analog range: 0.1µSv/h - 10 mSv/h
• Digital range: 0.01µSv/h - 9.99 mSv/h
• Energy range: 65 keV - 1.3 MeV
  • Automatic recognition of probe by 6150AD 5/6 Rate Meter
  • Robust waterproof aluminium housing
  • Up to 100m connection cable
  • Measures dose rates up to 10 Sv/h
  • H*10 ambient dose equivalent

Southern Scientific also supplies a High Dose Rate Probe for use with the 6150AD 5/6.

• Detector: GM tube ZP1200 effective length 40 mm, sensitivity approx. 5800 pulses per µSv
• User programmable alarms thresholds: One freely programmable threshold for each dose and dose rate (with smart models 6150AD5/6 only)
• Temperature range: -30°C to +50°C, deciation max. ±10% referred to indication at +20°C
• Humidity: Nominal range 60 to 130 kPa (600 to 1300 mbar)
• Power Supply: 4.75 V out of 6150AD, Battery life approx. 1500 hours at low dose rates with the 6150AD`s illumination off
• Housing: Black anodised aluminium, waterproof, Protection class IP67 according to DIN 40050
• Dimensions: 26 (diameter) x 149 (length) mm
• Weight: Approx. 110 g

The Gamma Probes 6150AD-15 and 6150AD-18 are probes to be used with the Dose Rate Meter 6150AD to measure photon radiation (gamma and X-radiation). Both models use a GM counting tube as the detector.

This data sheet only specifies the probes, not the 6150AD meter the probes are used with. It is assumed throughout this data sheet that the reader is familiar with the 6150AD (see the 6150AD data sheet). Probe types with extensions »/H« or »/E« are designed for Ambient Dose Equivalent H*(10), where »/E« probes only work with »/E« 6150AD models. The German PTB approval only applies to »/E« models.

Both probe models differ by the type of the built-in counting tube and therefore by dose rate range. If dose rates above 10 mSv/h are unlikely to occur, the 6150AD-18 is preferred, otherwise the 6150AD-15 with its high range up to 10 Sv/h.

Just like the Dose Rate Meter 6150AD itself, the probes are only suited for measuring photon radiation (not alpha or beta radiation). There are two reasons to use an external gamma probe rather than the internal counting tube of the 6150AD:

Place of measurement and place of reading are different, for example when measuring at places difficult to reach.

Extending dose rate range up to 10 Sv/h with the high range probe 6150AD-15, or down to approximately 0.1 μSv/h with the low range probe 6150AD-18. Using the 6150AD-18 with a 6150AD2 or 6150AD6 will not extend dose rate range because all these units use the same type of counting tube. Only the first reason makes such a combination meaningful.

Probe Cable (required accessory)
A probe cable (not included) is necessarily required to operate a probe. These standard lengths are available: 1.25m / 3m / 5m / 10m / 20m / 75m / 100m.

Source Holder 761.2 (optional accessory)
The source holder 761.2 serves to mount the check source 6706 (333 kBq Cs-137) or equivalent onto either probe type in a well-defined position. This allows reproducible radiological checks.