Sensor sensitivity?
The sensitivity of a gas sensor is the sensitivity of the device to the gas being measured. The sensitivity is usually expressed by the ratio of the resistance of the gas sensor in a certain concentration of the detection gas to the resistance in the normal air.
What is the definition of the sensor?
According to the National Standard of the People's Republic of China (GB7665-87), a sensor is defined as a device or device that can be measured and converted into a usable output signal according to a certain rule, usually consisting of a sensitive component and a conversion component. Wherein, the sensitive component refers to a portion of the sensor that can directly sense or respond to the measured component; the conversion component refers to a portion of the sensor that can convert the measured or sensed response of the sensitive component into an electrical signal portion suitable for transmission or measurement.
Gas detector long-term stability?
When the gas concentration is constant, if other conditions change, the gas sensor output characteristics remain unchanged for a specified period of time. It represents the resistance of a gas sensor to factors other than gas concentration.
What is the difference between the distribution system and the bus system?
The bus and the split line are in terms of how the controller is linked to the detector. If each detector requires a wire to complete communication with the controller, the connection is said to be a split connection. If several detectors can share a single wire to complete communication with the controller, the connection is said to be a bus connection. The bus generally transmits digital signals, and its form is many, such as RS485 bus; CAN bus.
What is a standard gas?
The standard gas introduction industry name, the standard gas is a standard substance. Standard materials are highly uniform, well-stabilized and accurate measurement standards. They have the fundamental role of reproducibility, preservation and transfer of values. They are used to calibrate measuring instruments and measurement processes in the fields of physics, chemistry, biology and engineering measurement. To evaluate the accuracy of the measurement method and the detection capability of the testing laboratory, determine the characteristic value of the material or product, and perform quantitative arbitration.
What does calibration mean?
Calibration refers to the calibration of the detector's indication value with a certain concentration of standard gas, generally including zero calibration and span calibration. Zero calibration generally refers to calibration in a high purity nitrogen or clean air environment. Span point calibration refers to the calibration of the detector with a certain concentration of standard gas.
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