Dimension inches (mm) | Pressure Switches
Reset button (only applies to 8757-GML/-GMH)
2.22 (56.5)
2.75 (69.9)
3 (76)
1.13 (28.7) 1.03 (26.2)
1.31 (33.3)
2.8 (72)
Electrical conduit connection 0.75" FNPT
5.94 (150.9)
1.59 (40.4)
0.28 (7.1)
2.31 (58.7)
0.5" FNPT conduit connection
0.5" FNPT Process Connection
1.97 (50.1)
2.3 (58)
4.25 (108.1)
1.5 (37.4)
0.4 (10)
Integrated test nipple
0.25" FNPT Process Connection
8757-GAO, -GML, -GMH
8757-4NN
2.75 (69.9)
2.22 (56.5)
2.75 (69.9)
2.22 (56.5)
1.03 (26.2) 1.13 (28.7)
1.31 (33.3)
1.31 (33.3)
1.13 (28.7) 1.03
(26.2)
Electrical conduit connection 0.75" FNPT
Electrical conduit connection 0.75" FNPT
5.78 (146.8)
5.89 (149.5)
1.59 (40.4)
1.59 (40.4)
0.28 (7.1)
2.26 (57.4)
2.15 (54.6)
0.28 (7.1)
0.5" FNPT Process Connection
0.5" FNPT Process Connection
0.73 (18.7)
1.97 (50.1)
1.97 (50.1)
3.72 (94.5)
4.25 (108.1)
4.25 (108.1)
8757-12NN
8757-6NN
4.5 (115) 4.34 (111)
3.25 (83)
1.93 (49)
1.95 (50)
2.75(70)
0.18 × 0.34 (5 X 9) KNOCKOUT
DIFFERENTIAL ADJUSTMENT SCREW
MAIN SCALE ADJUSTMENT SCREW
3.75 (95)
3.875 (99)
HOLE FOR 0.5 INCH CONDUIT
13.18 (30)
4.95 (126)
1.81 (46)
0.81(21)
CLEAR PLASTIC COVER
2.12 (54)
1.06 (27)
0 . 25" –FNPT Process Connection
1.5 (38 )
Bulletin 8757 page 8
8757-L404
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