Silicone oil is used as filling fluid for electronic instruments, taking advantage of its high flash point (high temperature resistance, non-volatile, oxidation resistance), low freezing point (low temperature resistance, non-freezing), low temperature and viscosity coefficient, and non-corrosiveness. , In the field of instrument manufacturing, silicone oil is almost used as the filling liquid for the diaphragm pressure, the capillary of the differential pressure transmitter or the measuring chamber, and the filling liquid for the diaphragm pressure gauge.

Silicone oil is used as instrument isolation fluid and measurement working fluid. Using the characteristics of silicone oil, the relative density of the isolation tank is higher than the high temperature silicone oil of the measured medium, so that the silicone oil enters the instrument and obtains economical and effective high temperature measurement. Using the characteristics of low freezing point of silicone oil and non-freezing at low temperature, in the cold north, low-temperature antifreeze silicone oil is used as the isolation fluid to prevent the freezing of the instrument impulse pipe and the freezing of the equipment. In terms of measuring the working fluid by the instrument, two isolation tanks are used. The isolation tank on the positive pressure side is fixedly installed on the upper part of the bell jar of the gas cabinet. The pressure pipe is installed at a fixed height, and the two isolation tanks are filled with low temperature and antifreeze silicone oil as the working fluid of the differential pressure transmitter. The height of the gas cabinet can be measured reliably and economically.
Silicone oil is used as a damping and shock-resistant fluid for electronic instruments. In order to overcome the damage to the pressure gauge caused by the strong vibration of the environment or the strong pulsation of the medium, the case of the pressure gauge is filled with damping silicone oil and supporting buffer devices to make ordinary shock-resistant. pressure gauge, so that it has good shock resistance. It is easy to read the measurement value and ensure the measurement accuracy.

Silicone oil is used as an oil bath for instrument calibration. It uses the good heat resistance, thermal conductivity and high temperature oxidation resistance of silicone oil. The oil bath using modified silicone oil as a heat carrier has faster heating/cooling and smoother control than traditional oil baths. It has the advantages of good temperature, temperature stability and constant temperature effect, as well as a series of advantages of extending the oil change time. It is an ideal oil bath and heating thermostat for temperature instrument calibration.
      Silicone oil is used in the calibration bench of precision pressure instruments. The calibration bench of pressure instruments using silicone oil for calibration of precision instruments uses the energy storage and discharge characteristics of the bladder accumulator to stabilize the oil pressure, reduce the impact and hysteresis, and can accurately Adjust the system oil pressure to make the system meet the calibration requirements of precision pressure instruments.
Silicone oil is used for fixing and encapsulation of electronic components, using the hydrophobicity, sealing and electrical insulation properties of the solid silicone sealant of modified silicone oil, it is used as filler or encapsulation of various electronic devices/modules. For example, the packing of capacitors, the insulating packaging of electronic components and devices (such as the packaging of the coil of the potted and sealed explosion-proof solenoid valve and the curing packaging of the measurement/replacement module of the integrated temperature transmitter, etc.).

Silicone oil is used as heat-dissipating grease for home appliances, electronics and CPUs. Such equipment or electronic devices must generate a certain amount of machine heat during operation. If the heat dissipation is not good, the working temperature of the device will rise, and the solder of the solder joint will melt. In severe cases, it may cause electrical failure or stop working. For example, for the heat dissipation of the CPU installed on the computer motherboard and all electronic devices in the machine, in summer, even if the fan speed reaches 2500 - 3000 r/min, the temperature in the case may still reach above 75°C; sometimes it reaches above 90°C, resulting in Computer black screen. According to the introduction of relevant materials, the heat-dissipating grease of organo-modified silicone oil with special properties for instruments and meters is applied to the gap between the CPU and the radiator or the surface of the high-power thyristor to dissipate heat to obtain a good heat-dissipating effect.
    Silicone oil is used as hydraulic oil for oil pressure switch valve. 201-100 wear-resistant dimethyl silicone oil (viscosity≤100mm2/s) is used as hydraulic oil for large-diameter hydraulic switch valve. Because of its moderate viscosity, lubricity and wear resistance Compared with the pneumatic switch valve of the same caliber, the silicone oil hydraulic switch valve is not only small in size and light in weight, but also has better hydraulic kinetic energy, good fluidity and sealing performance of the working fluid, avoidance A series of advantages such as oil leakage, long service life and safety.

Silicone oil is used in high vacuum devices. It is widely used in atomic energy accelerators, high vacuum systems of electron microscopes and TV picture tubes, strong power Manufacture of electronic tubes, microwave tubes and other cathode tubes.