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Mercoid Series B-190 Liquid
Level Switch-Control |
| Top Mounted Displacer Type, Adjustable
Setpoints, Magnetic Operation, Optional Hermetically Sealed
Snap Switch |
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 One
of our most versatile level controls, the model B-190 can
be used on all types of tank or sump level control applications.
Three porcelain displacers provide deadband adjustment. Unit
can start a sump pump (for example) when liquid reaches the
high set point and turn the pump off when the level drops to
the low set point. Unit works equally well in pressurized tanks.
Two stage units also available. Dimensional Information |
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| SPECIFICATIONS |
Service: Compatible liquids.
Wetted Materials: Cable, Spring and Stops: 316 SS. Optional
Inconel spring. Displacers: porcelain. Optional 304 SS, 316 SS,
or karbate (graphite).
Temperature Limits: 32 to 200°F (0 to 93.3°C). Higher ratings
available.
Pressure Limit: 125 psig (8.6 bar). Higher ratings available.
Enclosure Rating: NEMA 4X. Optional general purpose or explosion-proof.
Switch Type: SPDT snap switch, hermetically sealed snap switch or mercury
switch. Optional DPDT or two stage.
Electrical Rating: Snap Switch: 12A @ 120 VAC, 5A @ 240 VAC, 0.5A @ 125
VDC resistive, 0.25A @ 250 VDC resistive. Hermetically Sealed Snap Switch: 5A
@ 120 VAC, 5A @ 240 VAC, 5A @ 30 VDC resistive. Mercury Switch: 4A @ 120 VAC/DC,
2A @ 240 VAC/DC. Higher contact ratings available for the mercury switch.
Electrical Connections: Screw terminal.
Conduit Connection: 3/4" female NPT.
Process Connections: 4" 125# cast iron flange. Other material, size, and
rating flanges are available.
Mounting Orientation: Vertical.
Set Point Adjustment: Adjustable by moving displacers, see dimension chart
for minimum and maximum values.
Weight: 25 lb (11.34 kg).
Agency Approvals: UL and CSA.
Deadband: Adjustable by moving displacers, see dimension chart for minimum
and maximum values.
Specific Gravity: Standard is 1.0. Specify when ordering by replacing
1.0 in model number with specific gravity setting desired. Settable range is
0.5 to 1.2.
Cable Length: 10 ft (3 m) standard. Optional up to 100 ft (30.5 m). |
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| POPULAR MODELS (stocked model in bold) |
| Model
Number |
Description |
| B190-WT-7810-P-A-1.0-2 |
SPDT Snap |
| B190-WT-4810-P-A-1.0-2 |
SPDT Mercury |
| B190-WT-7810HM-P-A-1.0-2 |
SPDT Hermetically Seal Snap |
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