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Passive Infra Red sensors can detect movement of objects that radiate IR light.
MQ-4 GAS SENSOR have a good sensitivity to CH4, Natural gas. And also Fast response Stable and long life.
Auto Range/Frequency/Capacitance/ Temperature/DMM All in 1.AC True RMS measurement
Auto range, Frequency/Capacitance/Temperature/DMM All in 1.
LCD backlight, Data hold, ℃ and ℉ temperature test, Palm Size.
Frequency/Capacitance/Temperature/DMM All in 1.
Ideal For use in labs, industrial control and audits and measuring differential temperature