The ESB family contains an internal magnet that actuates a compatible reed switch as the float moves with the liquid level. Cylindrical and spherical versions suit guided float assemblies, while duckbill forms provide a compact moving float for compatible side-mounted sensors.
These are replacement or integration components for a complete level-sensing assembly. Select the stainless steel grade, magnetic characteristics and dimensions for the liquid and sensor. 304 and 316 stainless steel options are available.
| Form | Models | Float-body density | Installation |
|---|---|---|---|
| Duckbill | ESB001, ESB002; ESB-17×55 product designation | 0.88–0.9g/cm³ | Compatible horizontal side-mounted sensor |
| Cylindrical | ESB003–ESB028 | 0.4–0.77g/cm³ | Compatible guide and reed-sensor assembly |
| Spherical | ESB029–ESB056 | 0.3–0.81g/cm³ | Compatible guide and reed-sensor assembly |
The recommended liquid density is at least 0.9g/cm³. Confirm sufficient buoyancy for the selected float, especially where its nominal density is close to the liquid density. Suitable media include water, oil and other liquids compatible with the selected stainless steel.
Dimensions and tolerances below are in millimeters. OD is outside diameter, L is overall float length and ID is the central opening. Models sharing a row have the same listed dimensions.
| Model | OD | L | ID | Tolerance |
|---|---|---|---|---|
| ESB003 / ESB004 | 24 | 24 | 9.5 | ±0.5 |
| ESB005 / ESB006 | 28 | 28 | 9.5 | ±0.3 |
| ESB007 | 28 | 35 | 9.5 | ±0.5 |
| ESB008 | 35 | 35 | 9.5 | ±0.5 |
| ESB009 | 35 | 35 | 11.5 | ±0.5 |
| ESB010 | 35 | 35 | Not specified | ±0.5 |
| ESB011 / ESB012 | 38 | 26 | 9.5 | ±0.5 |
| ESB013 / ESB014 | 40 | 35 | 15 | ±0.6 |
| ESB015 / ESB016 | 41 | 51 | 15 | ±0.6 |
| ESB017 | 41 | 51 | 18 | ±0.5 |
| ESB018 | 45 | 56 | 15 | ±0.6 |
| ESB019 | 45 | 55 | 15 | ±0.6 |
| ESB020 | 45 | 56 | 18 | ±0.6 |
| ESB021 | 45 | 56 | 21 | ±0.6 |
| ESB022 | 45 | 56 | 23 | ±0.6 |
| ESB023 | 50 | 60 | 19 | ±0.7 |
| ESB024 | 50 | 60 | 21 | ±0.7 |
| ESB025 / ESB026 | 50 | 60 | 23 | ±0.7 |
| ESB027 / ESB028 | 51 | 61 | 15 | ±0.5 |
| Model | OD | L | ID | Tolerance |
|---|---|---|---|---|
| ESB029 | 30 | 30 | 9.4 | ±0.7 |
| ESB030 | 42 | 42 | 11.5 | Not specified |
| ESB031 | 50 | 50 | 21 | ±0.7 |
| ESB032 | 52 | 52 | 11.5 | ±0.6 |
| ESB033 | 52 | 52 | 12 | ±0.6 |
| ESB034 / ESB035 | 52 | 52 | 15.3 | Not specified |
| ESB036 | 60 | 180 | 18 | ±1 |
| ESB037 / ESB038 | 75 | 72 | 24 | ±1.5 |
| ESB039 | 75 | 75 | 15 | ±1.5 |
| ESB040 | 75 | 75 | 32 | ±1.5 |
| ESB041 / ESB042 / ESB043 / ESB044 | 100 | 100 | 24 | ±1 |
| ESB045 | 100 | 100 | 35 | ±1 |
| ESB046 | 120 | 120 | 24 | ±2 |
| ESB047 | 120 | 120 | 37 | ±2 |
| ESB048 | 120 | 120 | 46 | ±3 |
| ESB049 / ESB050 | 125 | 125 | 23 | ±3 |
| ESB051 | 125 | 125 | 15 | ±3 |
| ESB052 | 125 | 125 | 27 | ±3 |
| ESB053 | 125 | 125 | 30 | ±3 |
| ESB054 | 150 | 150 | 40 | ±4 |
| ESB055 / ESB056 | 200 | 200 | 27 | ±6 |
Confirm the final component drawing and magnet arrangement before ordering. In particular, confirm the 180mm length listed for ESB036 and any opening or tolerance shown as unspecified.
Match ESB001 or ESB002 to the intended sensor and mounting geometry. For all shapes, verify clearance, buoyancy, magnetic actuation and material compatibility. Keep the float free of deposits that could restrict motion, and check its response after installation or replacement.
