Features:

• Dual measurement system with automatic solenoid valve operation
• Ultra-low-level resolution: 0.1 kBq/m³ (0.003 µCi/m³)
• Wide Range: 1 kBq/m³ to 1,999 MBq/m³ (0.01 to 19,999 µCi/m³)
• Gamma compensated, with 1” lead shielding around detectors to further reduce background noise
• IP-54, NEMA-13 rated cabinet with polycarbonate window door and key locking latch
• Measures HTO or Total Tritium (HT + HTO)
• Sensitive to the only tritium; pollutants, radioisotopes (noble gases), aerosols, and particulates are removed and eliminated prior to measurement
• The 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

Description:

The Model 593.2 is the most sensitive tritium in air monitor that we offer and is designed for accurately measuring ultra-low levels of airborne tritium through the use of a dual measurement system with automatic solenoid valve operation to direct the sample to the appropriate detector.  A pair of 2L ionization chamber detectors are utilized for measuring the tritium when levels exceed 1 MBq/m³ in order to provide a fast response time of 10 minutes while instrument air is used as the purge gas for the Nafion dryer to save on P-10 usage.  The compensation ionization chamber is used to measure and subtract gamma and filtered radioactive gases from the Nafion dryer in a differential mode.  When tritium levels are <1 MBq/m³, P-10 is used as the purge and counting gas and the sample is directed to the proportional counting detector with a typical response time of 40 minutes to reach 90% of the final value.

Model 593.2 is sensitive to only tritium, a Nafion dryer (selectively permeable membrane) is used to isolate tritium oxide before measurement; all other sample constituents, including pollutants, radioisotopes (i.e., noble gases), aerosols, and particulates are removed and eliminated prior to measurement.  For measuring total tritium (HT + HTO), a catalytic oxidizer can be included to convert elemental tritium to tritium oxide.  The 593.2 features a large, color touch-screen LCD display and is housed inside an industrial IP-54, NEMA-13 rated cabinet with a polycarbonate window door and key locking latch on the door.  Custom software allows you to view configure alarm settings, generate graphs, view trends, monitor and display malfunction, and alert conditions, and log all data and events.

The 593.2 uses both electronic signal processing (analyzing pulse height and duration) and a second, sealed proportional counter to eliminate the effects from external gamma fields.  1” lead shielding around the counter tubes further reduces background gamma and improves the statistical signal to noise ratio to enhance sensitivity.

This instrument requires a supply of instrument air and P-10 gas for the operation of the proportional counting detectors.  Suggested P-10 cylinder size: 8.5 m³ (300 ft³).