Overhoff Technology Overhoff Technology CorporationCorporation

New Developments New Developments inin

Tritium MonitorsTritium Monitors

1September 2012 HPIC

Overhoff Technolgy

Our core business:

Design and manufacturing ofTritium in Air monitors

with ionization chamber detectors

• Portable• Fixed

2September 2012 HPIC

Overhoff Technolgy

Also:

Low Level Tritium in Air

• Gas Proportional Detectors• Passive Samplers (Bubblers)

3September 2012 HPIC

Overhoff Technolgy

Additional Areas of Interest:

• Tritium in Water• Radon

• Environmental Gamma• Data Acquisition

4September 2012 HPIC

Focus of Discussion

New Developments inOverhoff Tritium monitors

• Portable400AC, 200SS, 2x200-LD, TriCair

• Fixed421-HTO; 321BWC, 593, Triathalon

5September 2012 HPIC

Portable

Model 400AC

• MDA of about 2 Ci/m3 • Immune to radon• Dual channel Electrometer• Quad chamber for total Gamma

compensation• Communication to PC via RS-232;

Automatic Gamma CalibrationDiagnostics; battery life, power

supplies• Rechargeable NiMH Batteries• Constant flow; 2 LPM (5 volume

changes/min)

6September 2012 HPIC

Portable

Model 200SS

• Based on the Model 200SBNon-Gamma compensated, usesboth chambers for tritium measurementSuccessor to the Model 394 and AN/PDR-74

• 400cc volume; MDA of 2-3 Ci/m3

• Radon suppression• Fast response, 10 seconds to 90% of final

reading• Low cost

7September 2012 HPIC

Portable

Model 2x200-LD

can be configured as a “sniffer” to provide real-time indication of the T2

and T2O concentrations which allow

the user to quickly identify the source of leakage of tritium from

containers.8September 2012 HPIC

Portable

Model 2x200-LD

• Dual channel electrometer

• T2 and T2O, are selected with a front panel toggle switch

• Measurement appears on a single digital display.

9September 2012 HPIC

September 2012 HPIC 10

T2O + T2 SAMPLE IN

HEPA FILTER

T2 OUTDRIERITE

PUMP

T 2O/T 2

MODEL 2x200AS CONFIGURED ON DEMO UNIT

MAT2O/T2

Switch 2

1

+

+

-

-T2

T2O

Model 2x200-LD

Portable

Portable

TriCair

• Convertible hose connections and traps tomeasure Tritium or C14

• Dual channel electrometer

• T2 and C14 are selected with a front panel toggle switch

• Measurement appears on one display. 11September 2012 HPIC

Fixed MonitorModel 421-HTO

Nuclear Power Plant Monitor

(Heavy Water)

High Sensitivity Monitor in the

presence of high concentrations

of Noble Gases

Uses Nafion Dryer, only HTOpasses through

12September 2012 HPIC

Fixed MonitorModel 321BWC

Cart mounted systemIs semi-portable

Dual chambergamma compensated

13September 2012 HPIC

1” thick lead shieldingfor additional gamma compensation

Fixed MonitorModel 593 Revamped in

2012

Gas proportional detectors, MDA is 1 kBq/m3

Measures T2 and T2O, Oxidizer included

Noble gas compensation

Updated preamplifier

Single Board Computer

LCD touch screen14September 2012 HPIC

Fixed MonitorTriathalon

Family of monitors with multipleconfigurations for measurement of:

Tritium, C14, and Noble Gases

15September 2012 HPIC

September 2012 HPIC 16

Thank You!

Q and A

September 2012 HPIC 17

Questions and comments may be directed to:

Dell Williamson

Overhoff Technology Corporation

1160 U.S. Route 50

Milford, Ohio 45150 U.S.A.

Ph 513-248-2400, Fx 513-248-2402

dwilliamson@overhoff.com