Model Trimaran-H20


  • Automated, real-time tritium in water monitor using gas proportional counting
  • Includes sample enrichment loop to iteratively increase the concentration of tritium
  • Input water is separated into hydrogen gas (tritium) and oxygen via an electrolytic gas separator
  • Sensitivity of 0.5 kBq/L or 14,000 pCi/L in 8 hours or less
  • A sophisticated signal processor analyzes pulse height and duration to select only recognizable tritium decay events and reject large amplitude or long duration gamma and cosmic ray effects and system noise


The Model Trimaran-H20 and the Model Trimaran-SEA are automated, real-time, ultra-low-level tritium in water monitors which include a sample enrichment feature making this our most sensitive tritium in water monitor.

An electrolytic hydrogen gas separator is used to separate the input water into hydrogen gas (tritium) and oxygen.  The oxygen is diluted and released safely while the hydrogen gas containing tritium is cycled iteratively through a sample enrichment loop, thereby increasing the concentration of the tritium.  After sufficient sample enrichment, the tritium sample is mixed with P-10 gas and measured by an ultra-sensitive gas proportional counter.  A second, sealed proportional counter eliminates the effects from external gamma fields, and 1” lead shielding around the counter tubes further reduces background gamma and improves the statistical signal to noise ratio to enhance sensitivity.

The Trimaran is designed to measure below the US EPA’s drinking water limit of 740 Bq/L or 20,000 pCi/L.  The sensitivity of the Trimaran is 0.5 kBq/L or 14,000 pCi/L in 8 hours or less.

The Trimaran-H20 is designed for measuring freshwater, whereas the Trimaran-SEA is designed for seawater.  The Trimaran-SEA includes additional prefiltration (including RO) to ensure that the water is clean before it is introduced to the system.

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