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A laser level is a kind of level that uses a laser beam instead of manual reading. There are two types of laser levels: special laser level and laser device attached to the level. It can be used for leveling measurement by cooperating with a leveling rod equipped with a photoelectric receiving target. Compared with the optical level, the laser level has the characteristics of high precision, long line of sight and automatic reading and recording.

Thermocouples are a popular component for measuring temperature. Generally, the hot-selling thermocouples have good performance, such as a very wide range of temperature measurements, stable performance, accurate accuracy and no influence of media, etc. So how can we choose the right thermocouple?

A handheld metal detector is an instrument for detecting small metal objects. It can detect all kinds of metal objects hidden in the human body, including jewelry, electrical components, etc. Because of the metal detector's small size, lightweight, and ease to carry, it is widely used as an indispensable tool for personal inspection in security inspections.

Metal tube variable area flow meter is a traditional variable cross-section flow meter, which has many advantages such as simple structure, reliable operation, small and stable pressure loss, and can measure low flow rate media. It is widely used in measuring high temperature, high pressure, and corrosive fluids. medium. As determined by the measurement principle of the metal tube flow meter, it generally needs to be installed vertically. However, in some specific industrial applications, it is necessary to use a horizontally installed rotameter. Although the measurement principle is the same as the classic vertical rotameter, It is a rotameter with a special structure that can be installed in horizontal pipelines.

The air quality monitor is a product that can detect formaldehyde, PM2.5, TVOC and temperature and humidity in real-time. It is small and exquisite and easy to carry. Through its internal sensor, it can accurately measure the concentration of pollutants and calculate the air quality index AQI, and alarm when the concentration exceeds the standard. The principle of the air quality monitor is to detect the signals of the front-end formaldehyde sensor, PM2.5 sensor, TVOC sensor and temperature and humidity sensor, amplify the weak signal of the sensor through the operational amplifier, and remove the noise interference through the filter circuit, then collect it through AD, and use 32-bit high-precision CPU processing and calculation, converted into pollutant concentration values, and displayed on the LCD screen.

The dead zone is the region of time where the tester is temporarily blinded by a large amount of reflected light until it recovers and can read light again. Since the optical time domain reflectometer (OTDR) works by calculating the length of the cable and the point of failure based on time, a large number of reflections will cause the tester to take more time to recover, which creates a dead zone. The limitations of dead zones make optical time domain reflectometers (OTDRs) largely incapable of troubleshooting.

The thermocouple is a commonly used temperature-measuring instrument. It directly measures the temperature, and converts the temperature signal into a thermal electromotive force signal, and converts it into the temperature of the measured medium through an electrical instrument (secondary instrument). The basic structure of thermocouples is roughly the same, usually composed of main parts such as thermal electrodes, insulating sleeve protection tubes and junction boxes, and used in conjunction with display instruments, recording instruments and electronic regulators.

In contrast to power and energy meters, which can directly measure the loss of fiber optic cable equipment, optical time domain reflectometers (OTDR) work  indirectly. Optical Time Domain Reflectometer (OTDR) is made according to the principle of backward scattering and Fresnel inversion of light, using the backward scattered light generated when the light propagates in the optical fiber to obtain information about the attenuation, thus indirectly measuring the loss and fault location of optical fiber cables.

Handheld metal detectors are designed to detect metal objects carried by people or objects. It can detect weapons, explosives, or small pieces of metal in packages, luggage, letters, fabrics, etc. carried by people. The special appearance of its sensitive surface allows easy handling. Superior to ring sensor hand probes. Ultra-high sensitivity, special application. Such as prisons, chip factories, archaeological research hospitals, etc. Handheld metal detectors are used to detect the specific location of metal carried by a person.

The oilfields are scattered and the oil wells are unevenly distributed, often several kilometers or even dozens of kilometers away from the oil plant. Therefore, the pipelines for transporting crude oil and natural gas are spread all over the oil region. It is difficult to obtain the oil/gas production of each well and each region in real-time. In the past, the oil production stations, combined stations, and sales and sales offices of major oil fields mostly used the form of filling in reports at each oil production station to count the oil/gas production volume of each well and each area every day and then obtained the monthly production by accumulating. This method not only It takes a lot of manpower and material resources, but it is easy to make mistakes, and it is also seriously delayed in time. It is difficult for oil production plants and oil fields to dynamically grasp the oil production situation of each well or even each area, and it is difficult to respond quickly to emergencies. even cause major losses. Therefore, it brings a lot of inconvenience to the oilfield management and has a great impact on the improvement of the overall benefit of the oilfield. The combination of paperless recorders and wireless communication technology effectively solves these problems.