Compensation for Gamma background is crucial in tritium measurement, since a gamma field of 1mR/Hr will generate 500 times the ionization generated in 1μCi/m3 of tritium. Tyne designed the four, 250 cc ion –chambers in a cruciform with each chamber connected to an ultra sensitive electrometer amplifier and filter. All signals pass through the ADC converter, and the micro-processor calculates and displays the tritium value. To cover high ranges of tritium a separate small ion chamber is used. Measurements such as flow from the solid-state flowmeter and chamber temperature are also monitored by the micro-processor.?對γ背景的補償是氚測量的關鍵，因為1 mR/HR的伽瑪場產生的電離量是1 mI/m氚電離的500倍。TYNE設計了四，250毫升離子室在一個十字形，每個室連接到一個超靈敏的靜電計放大器和濾波器。所有信號通過ADC轉換器，微處理器計算并顯示氚值.為了覆蓋高范圍的氚，使用了一個單獨的小離子室。測量結果，如來自固態流量計的流量和室內溫度，也由微處理器進行監測。
Specifications
| Sensitivity | 1μCi/m3 ( 0.05 DAC) |
| Accuracy | ±3μCi/m3 from 1 to 100μCi/m3, ±10% from 100μCi/m3 to 20,000 μCi/m3 |
| Range | 1 μCi/m3 to 199,999 μCi/m3 |
| Detector | 4 matched chambers – Two for measuring, two for compensation |
| Measuring chamber effective volume | 500 cc (2 measuring chambers of 250cc each) |
| Flow rate | 1.0 L/m |
| Zero stability | ±1μCi/m3 immediately after unit is powered on |
| Background cancellation | Less than 10% of the reading change in 20 mR/hr field |
| Radon compensation | Included in the software |
| Ion trap | Built into each ion chamber |
| Dust filter | Built into the unit. |
| Noble gas cancellation | Ports for air inlet/outlet of measuring chambers and compensation chambers are accessible on surface plate so silica gel drier can be placed between the chambers to compensate for presence of noble gas. |
| Tritium Discrimination | Instrument can discriminate in a field of HTO and elemental H3 using the silica gel drier. |
| Purge/Decontamination | All 4 Chambers can be heated up by a cartridge heater controlled by unit |
| Display | Graphic touchscreen LCD display. Unit displays the values(tritium and Gamma) both in numerical format and graphical trend. |
| Communication | Can be configured to RS232(Short distance) or RS485(Long distance). |
| Analog output | 0-5 V Linear or logarithmic voltage output. |
| Power supply | 2.5 V- 5V external power supply, or 3 C-cell battery. Total power consumption is 150mA. |
| Gamma measurement | Gamma is measured directly by the unit. Gamma measuring range is from 0.1mR/h to 10R/h |
| Alarm | Tritium alarms, gamma alarms, low air flow alarms will all be shown by red LED light and by an audible device. |
| Data logging | The tritium and gamma values are logged every minute with current time and date stamp |
| Size and weight | 8″(L)x5″(H)x5″(W), 7 lbs. |
| Drier | Note that the silica gel drier is not part of the standard equipment, but can be supplied as an extra. |
| Response Time | 30 seconds at 90% of signal |