Edgetech Instruments, Inc.

The Edgetech Instruments Model DewTrak II dew point humidity transmitter is an optical chill mirror hygrometer designed to continuously measure the moisture content in gases. The instrument is powered by 24Vdc. The DewTrak II uses the chilled mirror dew point temperature condensation principle to determine the water vapor concentration in gas mixtures, and a platinum resistance thermometer to accurately measure that temperature. Outputs include 4 to 20mA, 0 to 5 Vdc, or 0-10Vdc and an RS232 serial port as well as electrically isolated relay contacts. 4 wire PRT measurement for Dew Point and AT (optional) ±0.2°C Accuracy for both Dew Point and Temperature Long term stability and repeatability RS232, bi-directional, Serial Output Electronics housed in IP65 enclosure (Wall Mount) Aluminum housing for other configurations 2 analog outputs (4-20mA 0-5Vdc to 0-10Vdc selectable) Automotive Educational Institutions Government Agencies HVAC Pharmaceuticals

Edgetech Instruments Pressure Transducer is designed for accurate pressure measurement of gases or liquids compatible with stainless steel. The high level output signal requires no additional signal conditioning and results in excellent stability, accuracy, and fast dynamic response, making the Model PTDM ideal for high performance applications. The stable electronic circuit, combined with Edgetech’s patented variable capacitance sensor, results in the ultimate in design simplicity. The sensor features a one-piece 17-4 PH stainless steel pressure sensor and an insulated electrode, which forms a variable capacitor. As the pressure increases, the capacitance decreases. This change in capacitance is detected and converted to a linear DC electric signal. General Purpose High Accuracy R&D Test & Measurement Vacuum Systems Dynamometers Engine Test Cells

4-20 mA Loop Powered Two Wire Oxygen Transmitter The Edgetech Instruments Model OxyTrans is an easy to use, accurate and economical way to measure Oxygen at trace and % levels. A simple display and one point calibration allows for a quick start of the instrument. Measuring Range The unit will offer ranges between 0-100ppm, 0-1, 000ppm, 0-10, 000ppm of oxygen. 0-1% to 0-25% O2. Sensor The OxyTrans uses a special fuel cell to measure the oxygen concentration. The sensor meets the industrial requirements for accuracy, sensitivity, easy to use and operating life. A 2 wire explosion-proof in-line oxygen transmitter II 12 G Ex ia IIC T4 (ATEX approved) 4-20mA output Display: 6 digit alphanumeric with bar graph 5 ranges offered: 0-100 ppm, 0-1, 000 ppm, 0-10, 000 ppm, 0-1%, 0-25% Oxygen sensor: a micro fuel cell Easy, accessible potentiometer Air Separators

The Edgetech Instruments Model DewTrakII MO dew pointhumidity transmitter is an optical chill mirror hygrometer designed to continuously measure the moisture content and Barometric pressure in the motor octane testing process. It is used to monitor and ensure compliance with test standards ASTM D2700, D2699, D2885. It guarantees measurement compliance for allowable Humidity range between 25–50 grlb & Pressure 21–30 in Hg (0.1 in Hg). The DewTrak MO powered by 24Vdc and can be easily fitted to existing Knock engine systems. It is specifically designed to measure conditions required for Motor Octane (MON), & Research Octane (RON) It uses the chilled mirror dew point temperature condensation principle to determine the water vapor concentration and barometric pressure measurement of the motor intake air fuel mix. Outputs include 4 to 20mA, 0 to 5 Vdc, or 0-10Vdc and an RS232 serial port as well as electrically isolated relay contacts. • Electronics housed in IP65 enclosure • 4 wire PRT measurement for Dew Point • ±0.5grlb Accuracy for Dew Point • Barometric Sensor • ± 0.044 “ Hg accuracy for Barometric Pressure • Long term stability and repeatability • Manifold Assembly Kit • LCD Display • Comes with a NIST certificate of compliance • Probe is installed in air tight housing with minimal resistance to intake air Automotive Educational Institutions R&D Test & Measurement Dynamometers Engine Test Cells

• Series137

The Edgetech Instruments Model 137 Vigilant Aircraft Hygrometer is a rugged, shock mounted military qualified instrument used for the primary measurement of dew point in flight or in installations with existing flow, such as wind tunnels. It features a miniature remote dew point sensor employing a platinum resistance thermometer, and has 15 feet of interconnecting cable to the control unit. Precision calibration units for the linear analog outputs are included. The specially designed dew point sensor is mounted through the skin of the aircraft and is mounted to either the left or right side of the aircraft. The dew point is detected by using chill mirror technology assuring precision accuracy, repeatability and reliability. The Edgetech Instruments Model 137 Vigilant Aircraft Hygrometer is a rugged, shock mounted military qualified instrument used for the primary measurement of dew point in flight or in installations with existing flow, such as wind tunnels. It features a miniature remote dew point sensor employing a platinum resistance thermometer, and has 15 feet of interconnecting cable to the control unit. Precision calibration units for the linear analog outputs are included. The specially designed dew point sensor is mounted through the skin of the aircraft and is mounted to either the left or right side of the aircraft. The dew point is detected by using chill mirror technology assuring precision accuracy, repeatability and reliability. Measure dew points in flight Rugged shock-mounted, military qualified Configuration for left or right hand mounting is available 110Vac power Chilled mirror sensor selection required (Click here for information on sensor selection) Atmospheric Sciences

• SeriesPPM1

The Edgetech Instruments Model PPM1 is a trace moisture analyzer designed specifically for monitoring moisture levels in dew point and PPM units. This trace moisture analyzer utilizes an electro-chemical (P205) sensor in combination with a proprietary semi permeable diffusion membrane. The principle of operation applies the Faraday’s Law of Electrolysis which measures the dissociation current making it a fundamental measurement of the moisture present. The PPM1 is ideally used in relatively clean, dry, inert gas applications. Sensitivity below 1ppm Fast response Long sensor life Low cost Fundamental measurement of moisture content Displays outputs—dew point (CF) and PPM values Air Separators Medical Gas Pharmaceuticals Semiconductor