Registered Quality System to ISO 9001:2008
30/60
Form 912
sorinc.com
913-888-2630
Minimum Specific Gravity
Model
Series
Standard
Anti-Vibration
or Pneumatic
740 0.43 0.57
804 0.41 0.50
Step 1: Model Series
The 740 and 804 Series mechanical level switches are displacer operated with sealed,
tamper-proof external chambers. Select the sensing unit from the following charts. Then refer to
pages 44 - 50 for switching elements, housings and accessories.
Select a model series from the charts below based on maximum operating pressure and minimum
specific gravity.
Maximum Working Pressure
740 A-A1C-B-A1-N4-CRTT
Select chamber material from the following chart. Maximum working pressure in the chart above is
based on the material selected here. Consult the factory for alternative materials.
Step 2: Chamber Material
740 A-A1C-B-A1-N4-CRTT
* Consult the factory for pressure ratings of units with Monel trim. Standard displacer units are not available
over 450
o
F (232
o
C).
740 and 804 Series
Model
Series
Chamber
Material
Pressure at Listed Temperature in psig (bar)*
100°F (38°C) 200°F (93°C) 300°F (149°C) 350°F (177°C) 400°F (204°C) 450°F (232°C)
740
A106B
316SS
1480 (102.0) 1294 (89.2) 1166 (80.4) 1118 (77.1) 1070 (73.8) 1034 (71.3)
804
A106B
316SS
3376
3504
(232.8)
(241.6)
3019 (208.2) 2721 (187.6) 2609 (179.9) 2497 (172.2) 2414 (166.4)
Designator Material
A A106 Grade B Carbon Steel with A105 and A234-WPB fittings
C A312-TP316/316L Stainless Steel with A182-316/316L and A403-316/316L fittings
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