Overhoff Technology

  Features: Stores all instrument data to a database ( Microsoft Access ) at user-definable intervals Displays all instrument data in table and graphical form (summary and real-time) Limit checks incoming data of all types; each instrument can have its own set of limits of desire Displays over limit or alarm status to security personnel at a terminal and sends email/phone alerts Generates reports on stored data: shift reports, or daily, weekly, and monthly reports can all be generated automatically and in hardcopy.  Graphs can also be included Identifies upward or downward trends in data Identifies non-transmitting instruments Tracks maintenance due on instruments and tracks locations of all instruments within your facility Displays video/images from webcams   Overhoff Overview is a customizable software package for networking multiple Overhoff instruments together or modeling a facility graphically in a series of views. https://overhoff.com/

  Measuring Tritium in Water Measuring tritium in water and tritium in seawater continuously on a real-time basis is an exceptionally difficult task due to tritium’s low beta emission energy (18.6 keV maximum, 5.6 keV mean) and the shielding properties of water.  Traditionally, liquid scintillation counting has been used to determine low level tritium concentration in water, although this method is typically performed by manually taking a sample and analyzing it later. Overhoff has developed several novel solutions for measuring ultra-low levels of tritium in water on a real-time, continuous basis.  Applications include: measuring heavy-water leaks in nuclear power plants (especially of the CANDU type) as well as monitoring tritium concentration in groundwater, drinking water, seawater, and liquid effluents. Model 1925 The Model 1925 was originally designed in 2004 working in conjunction with AECL and installed at Cernavoda NPP in Romania.  The Model 1925 is a real-t...

  Measuring High Concentrations of Tritium High concentrations of tritium are encountered during the manufacturing, storage, and processing of tritium.  These concentrations can vary all the way up to pure tritium. Typical systems include: Recovery systems Storage beds Fusion reactors Thermonuclear devices Pharmaceutical manufacturing Nuclear laboratories Gloveboxes The design of every one of our ionization chambers has been optimized for performance and economy.  To measure high concentrations of tritium, Overhoff uses ionization chambers with a small volume ranging from 10cc to 200cc, and employs closely-spaced large-diameter electrode configurations to minimize nonlinearities.  Wire-grid, gold-plated electrodes are used to reduce or eliminate the effects of tritium plate-out contamination on the wall of the chamber. In air ionization chambers, the assumption is made that all ions, both positive and negative, are separated from each other as they progress to the el...

  Model 400AC-WP Features: Water/Splash Proof Portable Tritium Air Monitor, all front panel components are sealed and gasketed Bright LED display, easily readable in sunlight and low-light conditions Gamma compensation ON/OFF toggle switch for easy gamma calibration Cruciform gamma compensation (400cc volume) with virtually no offset in fields up to 10 mR/h Sensitivity: 2 µCi/m 3 , 0.1 MBq/m 3 Range: 1 to 19,999 µCi/m 3  or 0.1 to 1,999.9 MBq/m 3  (DAC, MPCa, and µSv/h also available) Audible and visual alarm indicators for low flow, low battery, and signal level High voltage power supply malfunction alarm Alpha pulse suppression, radon rejection RS-232 Data Output Offset potentiometer control included CE Marked The Model 400AC-WP is a small, lightweight portable tritium in air monitor with the following features: water-proof enclosure, bright LED display readable in sunlight or low light conditions, gamma compensation on/off toggle switch for easy gamma calibration, NiM...

  Model 400AC-M Features: Portable tritium air monitor ruggedized for military use Circuit self-test function tests the unit to ensure it is working correctly prior to operation Water/Splash proof, with hinged gasketed cover to further protect front panel components Designed to operate in extreme conditions (temperature, ruggedness, salt, fog, wind, rain) Cruciform gamma compensation (400cc volume) with virtually no offset in fields up to 10 mR/h Sensitivity: 2 µCi/m 3 , 0.1 MBq/m 3 Range: 1 to 19,999 µCi/m 3  or 0.1 to 1,999.9 MBq/m 3  (DAC, MPCa, and µSv/h also available) Audible and visual alarm indicators for low flow, low battery, and signal level High voltage power supply malfunction alarm Alpha pulse suppression, radon rejection RS-232 Data Output Offset potentiometer control included CE Marked Descriptio The Model 400AC-M portable tritium in air monitor is based off the Model 400AC, but is tailored for military / rugged use.  All front panel components are e...

OTC has designed and built ionization chambers of many different sizes and configurations, each of which was optimized for a specific application, from measuring low-levels of tritium in room, stack, and effluent air monitoring applications to measuring high-concentrations of tritiumin glove boxes, fusion reactors, nuclear pharmacies, process piping, storage beds, and recovery systems, as well as challenging environments such as nuclear power plants.  OTC ionization chambers span all sensitivities, from 10 -7   Ci/m 3   to pure tritium, and can also be used to selectively measure tritium, or only its oxide, even in the presence of other radioactive gases.  OTC ionization chambers are designed for easy assembly and maintenance.  Ionization Chambers: An ionization chamber is an electrically closed vessel containing an internal electrode.  An electrical field is applied between the wall of the chamber and the electrode so that the ionization produced by radia...

  Model Triathalon-C14 Features: NEMA-4X wall-mount enclosure Smart, microprocessor driven with onboard data logging and custom software Two C-14 level alarms (alert and high), malfunction alarm, and low flow alarm included Gamma compensation (2L) Visual alarm indicators for signal level, low flow, and malfunction Alpha pulse suppression, radon rejection Long-term zero stable, span calibration is permanently stable due to special electrometer design Description: The Model Triathalon-C14 is a single-range ionization chamber C-14 (CO 2 ) in air monitor housed in a NEMA-4X wall-mount enclosure designed for stack or room monitoring applications.  This smart instrument includes a microprocessor, color LCD touch-screen display, and custom software with onboard data logging.  The subtractive balanced chamber electrometer circuit and radon rejection decrease background to negligible levels.  The software allows you to adjust units of measurement, alarm limits, the flow rate...

  Model SF-TF-6 Features: Ideal for wipe testing counting low energy beta emitters (H-3, C-14, S-35, etc.) Highly sensitive: 0.5 nCi (18.5 Bq) / sample Metal drawer with two 1.25” (31mm) diameter sample cavities surrounded by 1” lead shielding Low background (typically <10 CPM) windowless gas proportional detector Includes six decades of measurement (1-100,000 cps or other unit of choice) Audible and visible alarms, RS-232 data output Description: The Model SF-TF-6 is a small portable gas proportional counter with a shielded drawer system for measuring surface contamination collected on wipes, filter papers, or other thin samples.  It is suitable for measuring any alpha or beta emitter, but is designed for measuring low energy beta emitters such as tritium and C-14.  Contaminated wipes are inserted into a 2” wide metal drawer system with two sample cavities of 1.25” (31mm) diameter and 0.18” (4.5mm) depth and surrounded by 1” lead shielding.  Two cavities allow th...

  Model FF-27 Features: Quickly measure large, flat areas for tritium (and C-14) surface contamination Sensitive Area: 100cm 2  (6cm x 21.6cm) Sensitivity: 100 Bq/100cm 2 , 35 CPS above background Low gas consumption Portable, lightweight design with long battery life Audible and visible alarms, RS-232 data output Description: The Model FF-27 is an open-window gas proportional monitor for measuring tritium (and C-14) surface contamination on flat surfaces.  The FF-27 utilizes a large, rectangular windowless probe with 100cm 2  sensitive area (6cm x 21.6cm) to quickly scan large areas, using poly tape to provide repeatable spacing from the surface as well smooth, scratch-free movement.  The poly tape is easily cleaned, but may also be replaced if contaminated. P-10 counting gas is used in the FF-27 .  It is non-combustible and can be used in any environment.  Two lecture cylinders for P-10 gas are included with the instrument but are shipped empty due ...

  Tritium in Air Monitors (Portable and Fixed) Tritium Area, Stack, and Nuclear Power Plant Monitors Ultra-Sensitive Gas Proportional Tritium Monitors Tritium Process and Glovebox Monitors (including for tritium removal, storage beds, recovery systems, accelerators, and reactors) Tritium in Water and Tritium in Seawater Monitors Passive Tritium/C-14 Air Samplers (Bubblers) Tritium Surface Contamination Monitors Tritium Calibration Equipment Radon Air Monitor Each instrument is available with a wide variety of features to meet your specific requirements and includes a calibration certificate traceable to NIST.  We offer annual tritium gas calibration and repair services at our factory and also provide tritium calibration equipment so that you can calibrate the equipment on-site.  Overhoff Technology has gained an outstanding reputation for having tritium monitors that excel in performance, reliability, and are reasonably priced.  Our experience in producing hundreds o...