Dust Sensor Question
Q Is the Dust Sensor Wired when Shipped? 2022-06-29 11:52:28.542
Laser dust is wired, infrared dust is not wired.
Q How to Install and Place the Infrared Dust Sensor? 2022-06-29 11:52:11.377
It must be installed vertically. Keep away from artificial air flow such as fans. When used in air purifiers, the front and rear of the fan cannot be installed. Optionally install it on one side of the shell, but keep vents on the shell to ensure that the external air can diffuse in.
Semiconductor Sensor Question
Q Can the Two Voltages of Mq-7 Exist All the Time, or Do They Need to Be Powered Alternately? if It is an Alternate Power Supply, What is the Appropriate Power Supply Time? 2022-06-29 11:45:39.681
It requires alternate power supply. Please check the information on the product manual. This sensor is powered by 1.5V and 5V alternately. The low temperature and low voltage (1.5V) state can detect CO, and the high voltage (5V) is the desorption process. The recommended 5V voltage duration is 60s, 1.5V voltage duration is 90s to alternately supply power. Since it is a desorption process at 5V, it is normal for the voltage to drop when CO is 150ppm.
Q What is the Difference Between Semiconductor Sensors and Electrochemical Sensors? 2022-06-29 11:45:15.975
There is no good linear correspondence between the gas concentration and voltage of the semiconductor sensor, and it is generally only used for fixed-point calibration products; there is a good linear correspondence between the gas concentration and the output current of the electrochemical sensor, and can be made into quantitative detection products.
Q What Are the Precautions for Manual Soldering of Semiconductor Sensors? 2022-06-29 11:44:51.861
1. Flux: rosin flux with the least chlorine; 2. Constant temperature soldering iron; 3. Temperature: 250℃; 4. Time: no more than 3 seconds.
Q Can Wave Soldering Be Used for Semiconductor Sensors? 2022-06-29 11:44:24.542
Yes, but you need to pay attention to the following points: 1. Use rosin flux with the least chlorine; 2. Speed: 1-2m/min; 3. Preheating temperature: 100±20℃; 4. Soldering temperature: 250±10℃;
Q What is the Service Life of Mq Series Sensors? 2022-06-29 11:44:04.888
Usually, the life span is about ten years, and the actual application is related to the use environment and method of use.
Q Why Does the Sensitivity of the Semiconductor Sensor Reduce During Use? 2022-06-29 11:43:38.054
There are five main reasons: 1) Organosilicon, sulfide, phosphide, chlorine (fluorine) compound, alkali metal, etc. will poison the sensor; 2) The power supply voltage of the sensor has changed; 3) The sensor has been used for too long (Exceeded service life); 4) The test gas concentration is too high; 5) The sensor is subjected to severe vibration or destructive external conditions.
Catalytic Sensor Question
Q Can the Catalytic Sensor Be Made into a Digital Display? 2022-06-29 11:42:25.869
MC series catalytic products have good linearity and can be made into digital display products.
Q All the Mc Series Products Measure Combustible Gas, What is the Difference? 2022-06-29 11:42:09.137
MC series products are different in power supply voltage and current, their appearance and structure are also different; in addition, they are divided into two types: domestic and industrial. Industrial products require explosion-proof and the shell should be the explosion-proof structure of metallurgical powder mesh. The MC100 series is mainly used for domestic use, and the MC110 series is mainly used for industry.
Q What is the Reason for the Early Warning of the Catalytic Sensor? 2022-06-29 11:41:52.297
The sensor has a long cooling time and insufficient aging. The test conditions and environmental conditions for inspection and calibration are different. The vibration during use causes the zero point changing. It is activated by high-concentration gas during use, then the sensitivity becomes higher.
Q The Reason Why the Catalytic Sensor Has No Signal Output? 2022-06-29 11:41:32.396
1) The vibration during transportation or use causes the sensor to broken wire; 2) High voltage or short circuit burnout.
Q What Concentration of Ch4 Gas is Generally Required when the Catalytic Sensor is Calibrated? 2022-06-29 11:41:06.613
Electrochemical Sensor Question
Q Is the Power Consumption of the Electrochemical Sensor High? 2022-06-29 11:39:58.187
The principle of the electrochemical sensor is that under the action of the catalyst, a redox reaction occurs on the electrode surface to generate an electric current. The sensor itself does not consume electricity. While after it is developed into a module, other components on the module consume electricity.
Q Can the Electrochemical Sensor Be Used at a High Temperature of 70 Degrees? 2022-06-29 11:39:38.509
It cannot be used at such a high temperature. High temperature will easily deform the sensor shell and cause liquid leakage. Moreover, the electrolyte evaporates faster in a high temperature environment, and the life of the sensor will be shortened.
Q What Do the Pins of Me3 Series Sensors Mean? How to Judge? 2022-06-29 11:39:20.719
W represents the working electrode, C is the counter electrode, R is the reference electrode. The top is the W pole, the left is the R pole, and the right is the C pole. In the circuit, W is connected to the negative pole, and C is connected to the positive pole.
Q What is the Difference Between the Diffusion Type Alcohol Sensor and the Pump Type Alcohol Sensor? 2022-06-29 11:37:58.917
Diffusion type means that the sensor is directly installed in the environment of the object to be measured, and the measured gas is in direct contact with the sensor detection element through natural diffusion; Pump suction type means that the gas to be measured is introduced into the sensor detection element by means of a suction pump.
Q Can the Electrochemical Sensor Be Used in an Environment Where the Temperature is Lower Than -20℃? 2022-06-29 11:37:43.173
The output signal of the electrochemical sensor will become smaller when the temperature is lower than -20°C. It is recommended that temperature compensation be required in the application of the whole machine.
Infrared Sensor Question
Q What is the Difference Between Mh-z19b, Z14a and Z14? 2022-06-29 11:36:38.398
Z19B and Z14A are single detector channel, low cost, generally for household use; Z14 is dual detector channel; Z19B is small and easy to integrate.
Q What is the Difference Between Mh-z19b and Mg812? 2022-06-29 11:36:11.149
MH-Z19B is based on infrared principle, MG812 is based on solid electrolyte principle, and the infrared performance is better. Both are suitable for indoor carbon dioxide detection. The solid electrolyte is used for fixed-point calibration, the linearity is not good relatively.
Q Can Mh-z19b Sensor Use 485 or 422 Interface to Convert to Usb and Directly Connect to Computer? 2022-06-29 11:35:47.756
No, It is a TTL serial port, need a transfer cable with TTL serial port.
Q Why Does the Infrared Sensor Need to Be Preheated, Can It Not Be Preheated? 2022-06-29 11:35:08.560
No, preheating is a process to stabilize the light source and detector inside the infrared sensor. If it is not preheated, the test data will be biased.
Sensor Arduino Question
Q What is the Difference Between the Carbon Monoxide Detection Module Ze15 and Ze16? 2022-06-29 11:34:38.795
The electrolyte of ZE16 is water. Disadvantages: water will freeze below zero. If the sensor is stored or operated at low temperature for a long time, the water will be gradually exhausted and will not react, the life span will be shortened. ZE15 carbon monoxide module is acidic electrolyte, advantages: less affected by external temperature.
Q What is the Difference Between Sensor and Sensor Module? 2022-06-29 11:26:49.499
The sensor is a component, customer needs to do the circuit design. The sensor module is equipped with a circuit board and has been calibrated which can save the customer's development time.
Q How to Calibrate the Gas Sensor? 2022-06-29 11:26:26.375
A specific concentration gas is injected into a closed test box of a specific volume, and the process of learning and memory of the gas sensor at this concentration is calibration. Different sensors have different calibration methods
Q Why Should the Front Vertical Air Intake Be Avoided when the Sensor is Applied and Tested? 2022-06-29 11:26:05.783
It affects the stability of the test results. 2) It affects the response speed of the sensor.
Q Is the Sensor in Stock and Can It Be Delivered on the Same Day? 2022-06-29 11:25:41.718
Sensor needs to be tested, inspected and calibrated before shipment. If they are in stock, they will generally be shipped the next day.
Q What Type of Terminals Are Our Products? 2022-06-29 11:24:28.868
ZH03B terminal specification is 1.25*8pin; MH-Z19 series, ZE08 terminal specification is 1.25*7pin; ZPH01B, ZPH02 series terminal specification is 2.54*5pin; ZP01, ZP07 series terminal specification is 2.54*4pin.
Q What Gases Do Tvocs Often Contain? 2022-06-29 11:24:01.086
Formaldehyde, toluene and other organic volatiles, the main components: benzene series, organic chlorides, Freon, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbon compounds.
Q The Specification Requires Aging for 48 Hours, Does It Need to Be Aged Before Each Use? 2022-06-29 11:23:31.840
The recommended aging time is not less than 48 hours when it’s the first test or not used for a long time; 3-5 minutes of aging time is required for frequent use.
Q What Are the Ideal Conditions for Storing the Sensor? 2022-06-29 11:22:55.753
Temperature and humidity conditions: 20℃±2℃; 65%±5%RH in a clean air environment.
Q The Reason Why the Sensor Cannot Be Calibrated or Does Not Alarm After the Sensor is Made into a Complete Machine? 2022-06-29 11:21:47.119
The poisoning of the sensor reduces the sensitivity. Generally, the whole machine materials (shell, cable, buzzer, rubber gasket, three-proof paint, etc.) and building decoration materials (various glues, putty, etc.) contain silicone that cause sensor poisoning.