TRITIUM SURFACE CONTAMINATION MONITOR

Model # PTS-26 /S /M

Model # PTS-27 /S /M([fig] ([fig] PTS-26S) AND NOW...

MODEL PTS-27/PRS FOR REJECTION OF OTHER
NUCLIDES AND INTEGRATION CAPABILITIES


FEATURES:

* PORTABLE

* SENSITIVE

* LOW GAS CONSUMPTION

* BUILT IN AUDIO

* AUTO GAS SHUTOFF

DESCRIPTION: The PTS-26 and PTS-27 Tritium Contamination
Monitors are portable gas flow proportional counters sensitive
to betas of H-3. The windowless probes slide over flat surfaces
on poly tape which gives repeatable spacing from surface
as well as easy scratch-free movement.The poly tape is easily
cleaned but may also be replaced if contaminated. P-10 counting
gas utilized in the PTS-26 and PTS-27 probes is non-combustible
and can be used in any environment. 


Gas use is minimized by careful design of chamber and by
auto shut-off of gas flow when "trigger"
on probe handle is released. Typical counting efficiency
is 70% of all Tritium betas escaping the surface being monitored
as compared with results obtained using an internal hemispherical
2 pi counter. Gas flow is normally set at 800 cc/min, giving
a one hour use for lecture bottle or, of course, proportionally
longer within larger cylinder. (See option below) Probe
may also be used to monitor hands, clothing and equipment
with included Model H face plate. Two lecture cylinders
of P-10 gas are included with instrument. 


The electronics include T/A stabilized high voltage bias
supply, preamp, pulse shaper and pulse to analog converter.
Circuit design minimizes recovery time of detector and allows
linear response at higher count rates than previously possible.
A piezo electric speaker with volume control and 3-1/2"
meter provide audible as well as visual readout.

T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
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  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   


$Revision: 1.1 $

TRITIUM SURFACE CONTAMINATION MONITOR

Model # PTS-26 /S /M

Model # PTS-27 /S /M

SPECIFICATIONS:

Ranges: 500; 5,000; 50k; 500k cts/min (PTS-26M and PTS-27M)
or
0-10; 100; 1,000; 10,000 cts/sec (PTS-26S and PTS-27S)

Flowmeter: 10-1000 cc/min. Needle valve control.

Background: Typically less than 500 cts/min or 10 cts/sec
(PTS-26M or PTS-26S)
800 cts/min for (PTS-27M)
15 cts/sec for (PTS-27S)

Controls: Open range switch, battery check, flow gas control,
sound volume control.
Hidden high voltage bias supply for detector: Input sensitivity
high voltage control.

Calibration: 4 range pots and 1 overall control. Internal.

Detection Area: PTS-26S (or M) With clothing mask
attached 0.5cm x 6.5cm. Mask removed 1.5cm x 11.5cm.
PTS-27S (or M) With clothing mask attached 0.5cm x 14cm.
Mask removed 4.6cm x 21.6cm.

Sensitivity: At 100 Bq/100 cm^{2},
35 cts/sec above background for PTS-27.
6 cts/sec above background for PTS-26.

Battery: 2 nine volt "transistor"
batteries Eveready 1222 or equivalent, 300 hour normal operating
life.

Weight: Probe PTS-26: 0.53 Kg (1lb. 3 oz.)
Probe PTS-27: 0.57 Kg (1lb. 4 oz.)
Electronics Package: 2.6 Kg (5lbs. 12oz.) plus
P-10 gas container: 0.6 Kg (2lbs. 6 oz.)

Shipping Weight: 15 lbs.

Option: Larger gas cylinder (DOT 3AA2015) 35 capacity of
lecture bottle. On two wheel dolly.

T_{\textrm{A}}                                   TECHNICAL ASSOCIATES                                   
------------------------------------------------------------------------------------------
  7051 ETON AVENUE * CANOGA PARK, CA 91303 TELEPHONE (818) 883-7043 * FAX(818) 883-6103   


$Revision: 1.1 $