Tritium Air Monitor: High performance portable survey monitor
SENSITIVITY
The 400SBDγC is useful for measurements as low as
2 μCi/m3
. The new OTC electrometer, which measures
to below 10-16 amperes combines low noise and high
zero stability. Unlike other instruments, the 400 series
instruments no longer require a front panel manual zero
control. Thermally induced zero shifts of the
electrometer and associated electronics have been
eliminated.
Tritium Air Monitor: Model 400SBDγC |
RADON INTERFERENCE, NOISE RESPONSE
For an unambiguous measurement of very low tritium a
monitor must be able to ignore response to ambient
radon. The 400SB series incorporates this capability and
therefore produces accurate, fast and drift free
measurements to nearly +1 μCi/m3
.
TOTAL GAMMA COMPENSATION
Cruciform ionization chamber geometry provides nearly
perfect gamma compensation regardless of photon
energy, flux gradient or flux direction. Gamma
compensation of the 400 series instruments is typically
three orders of magnitude better than instruments using
nested or side by side ionization chambers.
Tritium Air Monitor: Model 400SBDγC |
FAST RESPONSE
Its exceptionally rapid response is uniquely due to its
ability to ignore radon. The electronic time constant is
only 10 seconds, the pneumatic time constant of about
12 seconds, for an overall time constant of only 15
seconds. Meter readings will reach 90 % of final value
within 30 seconds to a step response of aspirated
tritium.
FAST WARM UP, NO ZERO DRIFT
After applying power, the initial transient “warm up” drift
effects take less than a minute. Long term drifts have
been eliminated, manual zero adjustments are no longer
required.
HTO DISCRIMINATION (MODEL 400SBDγC-HTO)
By addition of a desiccant column, this survey instrument
will specifically measure HTO in the presence of other
radioactive gases as well as background gamma. The
desiccant can be regenerated repeatedly for reuse.
To know more please visit: US Nuclear Corp
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