Mercoid Series 201/203/204

Side Mounted-Chamber Type Level Control

Operating Pressures to 500 psig, 34 bar — Hermetically Sealed Snap Switch Option

Long life and reliable operation is inherent in the design of the Mercoid Series 201. The heavy duty welded carbon steel chamber provides a control to operate up to 1000 psi (69 bar) and process temperature up to 750°F (400°C), with 400°F (205°C) at the electrical head assembly. The use of an external magnet reduces the possibility of magnetic particle build-up inside the armature tube. Choice of construction provides equipment suitable for specific gravity as low as 0.60. Electrical requirements are met by hermetically sealed snap action or mercury switches in SPST, SPDT, DPDT, and DPST arrangements.

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Specifications

Service

Compatible liquids.

Wetted Materials

Body: carbon steel, optional 316 SS; Float and Trim: 303/304/316/430 SS.

Temperature Limit

Process: 750°F (399°C). Heat fins required above 500°F (mercury), 400°F (snap), 350°F (hermetic snap).

Pressure Limit

600 psig (41 bar) at 100°F; 500 psig (34 bar) at 750°F. Higher ratings available.

Enclosure Rating

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

Repeatability

±1/4″ (6.4 mm).

Switch Type

SPDT snap switch, hermetically sealed snap switch, or mercury switch. Optional DPDT or two stage.

Electrical Rating (Snap)

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

Electrical Rating (Hermetic Snap)

5A @ 125 VAC, 5A @ 240 VAC, 5A @ 30 VDC resistive.

Electrical Rating (Mercury)

4A @ 120 VAC/DC, 2A @ 240 VAC/DC. Higher ratings available.

Electrical Connections

Screw terminal.

Conduit Connection

3/4″ female NPT.

Process Connections

1″ female NPT and 1″ socket weld hub. Optional flange connections.

Set Point Adjustment

±1″ (25.4 mm).

Specific Gravity

0.6 minimum.

Weight

201: 33 lb (14.97 kg); 203: 37 lb (17 kg); 204: 44 lb (20 kg).

Agency Approvals

UL and CSA.

Popular Models

Model Number	Description
201-WT-7810-C1-60	Chamber type level control, side mounted, SPDT snap switch.

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