de honeywell heeft een gevoeligheid van 3-3.25mV/ Gaus??
de oude heeft een gevoeligheid van 0,5 mT?
Melexis US1881The Melexis US1881 (available from sparkfun at $0.95) is a Latching Hall Effect Sensor meaning that once it is triggered it latches and will not unlatch until a magnetic force of reverse polarity and strength is sensed. So If the north pole of a magnet turned it on, the south pole of a magnet is then needed to turn it off. When the US1881 is triggered the output will be equal to the source voltage (3.5 to 24V) and unlatched will output 0v/ground.I did find that using an overly strong magnet with this sensor would sometimes not latch it or would latch it to the point that it was hard to unlatch. So keep your 1in rare earth magnets away from this one.
SS490 Series MRL (Miniature Ratiometric Linear) sensors have a ratiometric output voltage, set by the supply voltage. It varies in proportion to the strength of the magnetic field.A new Hall effect integrated circuit chip provides increased temperature stability and sensitivity. Laser trimmed thin film resistors on the chip provide high accuracy and temperature compensation to reduce null and gain shift over temperature. The quad Hall sensing element minimizes the effects of mechanical or thermal stress on the output. The positive temperature coefficient of the sensitivity helps compensate for the negative temperature coefficients of low cost magnets, providing a robust design over a wide temperature range.