Mercoid Series 195

Two Stage Top Mount Displacer Type Level Control

Independent High & Low Setpoints — Pump Control + Alarm in One Unit

The Mercoid Series 195 is a two-stage top mount displacer type level control, providing independent high and low level switching from a single unit. Like the Series 190, it uses the displacer principle for reliable operation across varying liquid densities and turbulent surfaces. The two-stage design is ideal for pump start/stop control with an independent alarm setpoint, or for dual-stage alarm systems requiring separate high and low level alerts. The adjustable deadband on each stage allows precise calibration of the differential between the two switching points. Top mount installation simplifies field installation on open tanks and vessels.

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Specifications

Operating Principle

Displacer type (buoyancy change). Not float-actuated.

Stages

Two stage (independent high and low switching points).

Mounting

Top mount.

Wetted Materials

Displacer: 304 SS; Stem: 304 SS; Cage: carbon steel, optional 316 SS.

Temperature Limit

300°F (149°C).

Pressure Limit

150 psig (10.3 bar).

Deadband

Fixed or adjustable per stage (specify at time of order).

Enclosure Rating

NEMA 4X standard. Optional general purpose or explosion-proof.

Switch Type

Two SPDT snap switches or mercury switches (one per stage).

Electrical Rating (Snap)

12A @ 120 VAC, 5A @ 240 VAC, 0.5A @ 125 VDC, 0.25A @ 250 VDC resistive.

Electrical Rating (Mercury)

4A @ 120 VAC/DC, 2A @ 240 VAC/DC.

Electrical Connections

Screw terminal.

Conduit Connection

3/4″ female NPT.

Process Connection

1-1/2″ female NPT top mount.

Specific Gravity

0.7 minimum.

Agency Approvals

UL and CSA.

Popular Models

Model Number	Description
195-WT-7810-C-60	Two stage displacer level control, top mount, 2× SPDT snap switch, fixed deadband.
195-WT-7810-C-60-ADJ	Two stage displacer level control, top mount, 2× SPDT snap switch, adjustable deadband.

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