| Hot-wire Semiconductor (CH) |
Detects changes in resistance across the edges of platinum wire as a result of variations in thermal and electrical conductivity due to absorption of gas on the surface of a semiconductor.
FEATURES
- Sensitive and large variation in output at low gas concentration.
- Shorter initial stabilization time, more compact, and greater energy savings compared with a semiconductor sensor.
- Long service life, high stability, and high durability.
- Selective sensitivity to gases (H2, CH4, and C2H5OH).
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| Catalytic Combustion (CS) |
Detects the temperature rise (change in resistance) of the platinum coil by oxidization of a gas in contact with a catalyst on the surface.
FEATURES
- Output-to-gas concentration is linear to LEL.
- High accuracy and superior repeatability.
- Immune to ambient temperature and humidity.
- Power saving type(CSS) consumes only 1/4 of our conventional contact combustion sensor.
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| Thermal Conductivity (CT) |
Detects temperature variations in the heat source (platinum coil) caused by differences in gas heat conductivity.
FEATURES
- Output: Gas concentration is linear up to 100% by volume. Suitable for measurement of high concentrations of gases.
- Using thermal conductivity (a physical property of gas) makes measurement free from catalyst deterioration or poison, and ensures economy.
- Catalyst not required.
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| Controlled Potential Electrolysis (COS) |
Detects gas concentrations through the electrolytic current that results from gas electrolysis.
FEATURES
- Extremely sensitive: 1 ppm of CO detectable.
- Selective sensitivity to gases. Most suited to detection of toxic gases.
- Superior linearity at low concentrations. Suitable for analytical applications.
- High immunity to interfering gas.
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| Thin Film Semiconductor (AET) |
Detects variations in electric conductivity caused by gas absorbed on a thin film semiconductor with a thickness of 100 nm.
FEATURES
- More sensitive than a semiconductor sensor.
- Selective to gases (e.g., Cls, H2S, or EO)
- Self-cleaning effect on the surface ensuring high repeatability and long-term stability due to high working temperature.
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| Galvanic Cell (OS) |
Detects reactive current resulting from using oxygen as an active material for a battery cell that consists of Pt-Pb electrodes, a diaphragm, and an electrolytic solution.
FEATURES
- Requires no external power supply.
- Easy to use and inexpensive with wide marketability.
- Output is proportional to oxygen concentration linear up to 40vol%.
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| Semiconductor (CZ) |
Detects variations in electric conductivity caused by a gas absorbed on the surface of a metal oxide semiconductor.
FEATURES
- High sensitivity, large output variation at low concentration.
- Long service life and long-term stability.
- Superior to catalytic combustion sensors in toxic gas or severe atmospheric conditions.
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| Orgastor (OR) |
Detects variations in resistance representing the swelling property of a carbon resistor, especially binding polymer, with respect to oil or organic solvent vapor.
FEATURES
- Works at normal temperatures with a fast response .
- Compact and lightweight with excellent resistance to mechanical shock.
- Selective detection for oil or organic solvent vapors by choosing the binding agent.
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