Moved to here:
 http://amasci.com/maglev/hall.html




VARIOUS COMMON HALL-EFFECT SENSORS                      William J. Beaty

for addresses of suppliers, see http://amasci.com/supliers.html

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SWITCHING TYPES (not linear/proportional)

Part #     polarity   on/off field    manufacturer
------     --------   ------------    ------------

UGN3040    Unipolar   150g,100g       Allegro
R & D Electronics $0.75

SS41       Bipolar                     Microswitch
R & D Electronics       $0.50   ($0.39 @ 100 qty)  
Electronics Surplus (Cleveland)

UGN3075LT  Bipolar    +-100g         ????Allegro?
All Electronics         $0.50   ($0.45@ 100 qty)(SMT package)

UGN3035    Bipolar    +-25g             Allegro

UGN3130    Bipolar    +-150g          Allegro

UGN3140    Unipolar    200g, 50g       Allegro


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LINEAR TYPES (Proportional output)

Part #     polarity   on/off field    manufacturer
------     --------   ------------    ------------

TL3103     Linear     16v/T           Texas Instruments

UGN3501    Linear     .7mV/G          Allegro

UGN3505    Linear     3.5mV/G         Allegro

SS490      Linear                     MicroSwitch

MLX90215VA Linear    Melexis (w/onchip D/A, RAM)

HALL EFFECT SENSOR ICs, EDN Magazine, by Bill Travis
 http://www.ednmag.com/reg/1998/040998/08df_01.cfm