The advantages of reed tube are introduced

　　In the technology of reed tube and Hall effect sensor, its size is shrinking. However, when a reed tube sensor is compared to a Hall effect sensor (see attached table), some advantages of reed tubes can be seen:

　　Hall effect devices are generally low in price, but need to add expensive power supply circuit power supply, its output reed tube, the advantage signal is so low, usually also to add amplification circuit. It can be argued that the end result is that the Hall effect sensor is more expensive than the reed tube sensor.

　　The reed tube switch has excellent insulation from input to output and the insulation resistance of the switch is up to 10Ω. The result is A leakage current level of 10 A. When inserting a human probe or pacemaker into a medical electronic device, it is important for these devices not to have any leakage current close to the heart. Microampere or submicroampere currents can change the critical electrical mobility of the heart.

　　It can directly switch signals ranging from several nanovolts to thousands of volts, currents from femA to Amps, and frequencies from DC to 6GHz. The output range of Hall effect devices is very limited.

　　Reed tubes provide magnetic sensitivity over a wide range.

　　Reed tube is not sensitive to ESD, and the advantages of reed tube ESD can often damage the Hall effect sensor.

　　Reed tube sensors can withstand very high voltages (the minimum rating is 1000V). Hall-effect devices require external circuits that are rated to 100V.

　　The reed tube sensor can withstand a typical reed tube drop of 3 feet, and the drop test is similar to that of the Hall effect sensor.

　　Because reed tube sensors have no wear components, low loads (below 5V and below at 10mA) can be operated millions of times. This is equivalent to the number of semiconductor micromachined devices.

　　Reed tube sensors have no effect on the temperature environment, reed tube, advantages Typical operating temperature range from -50 ° C to +150 ° C, no special conditions, restrictions or costs. The Hall effect sensor has a limited operating temperature range.

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