UK T. (+44) 1492 582 323

Americas T. +1 (559) 456-1711

Asia T. (+852) 6503 3486

Water/Gas Sampler

Water and gas sampler probes are used to take a discrete sample of well fluid at a particular depth and to return it uncontaminated to the surface.

Principle of Measurement:

Water sampler: The water sampler includes a chamber incorporating motor-actuated valves at the top and base. While the probe is being lowered into the borehole, the valves are held open, allowing well fluid to flow freely through the chamber. At the desired depth, the motor is activated under surface control, closing the valves to seal the chamber and contents ready for retrieval.

Gas sampler: The gas sampler is designed to retrieve uncontaminated samples of well fluids comprising or containing gas whilst maintaining the original well pressure. The probes contain a sealed sample chamber with a moveable piston and motor-actuated valve. Prior to logging, the piston is withdrawn manually and locked into position, leaving a partial vacuum within the sample chamber. For sampling, the valve is opened under surface control, allowing the well fluid to enter the chamber. The valve is then closed, enclosing the sample under ambient pressure. At the surface, the fluid can be transferred while still under pressure to a suitable container for analysis.


  • Simple, motor-operated actuation
  • Water sample chamber easily cleaned
  • Water/gas sample retained at borehole pressure



  • Sampling well fluid at depth for surface analysis
  • Groundwater and water well studies


Water Sampler

Diameter: 38mm
Volume: 1li
Length: 1.88m
Temperature: 0-70⁰C (extended ranges available)
Max. pressure: 20MPa

Water/Gas Sampler

Diameter: 51mm
Volume: 1li
Length: 1.55m
Temperature: 0-70⁰C (extended ranges available)
Max. pressure: 20MPa

Operating Conditions

  • Borehole type: open/cased, water-filled

Sales Information

I002198 Water samples 1li
I002206 Water/Gas sampler 1li

Download Water/Gas Sampler sheet


...Practical Innovation with Global Service & Support...

Robertson Geologging Ltd., 2017

how can we help you?

(+44) 1492 582 323