Mercoid Series 500
Insertion Type Level Control
Adjustable Deadband, Weatherproof Enclosure, Direct Tank Mount
Adjustable deadband combined with direct 2-1/2″ threaded or 2-1/2″ flange mount makes the reliable, heavy duty Mercoid Series 500 ideal for liquid level control in large or small tanks. Chambers are available in cast iron, cast steel, or cast 316 stainless steel. Float rods are available from the standard 6″ up to 24″ long, providing action down to a specific gravity of 0.55. A variety of circuits can be ordered including SPST, SPDT, or DPDT with hermetically sealed snap action or mercury contacts.
Specifications
Service
Compatible liquids. Cast iron not for use with lethal or flammable substances.
Wetted Materials
Body: cast iron, cast steel, or 316 SS; Float and Trim: 316 SS.
Temperature Limit
425°F (218°C).
Pressure Limit
400 psig (27.6 bar).
Enclosure Rating
NEMA 4X standard. Optional general purpose or explosion-proof.
Deadband
Adjustable 0.5″ (12.7 mm) to 3″ (76.2 mm).
Switch Type
SPDT snap switch or mercury switch. SPST, DPDT available.
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. Higher ratings available.
Electrical Connections
Screw terminal.
Conduit Connection
3/4″ female NPT.
Process Connection
2-1/2″ male NPT. Optional 2-1/2″ flange.
Set Point Adjustment
Approximately ±1/2″ (12.7 mm) at minimum deadband.
Float & Rod Insertion Length
6.5″ standard. Optional 12″, 18″, or 24″ rod length.
Specific Gravity
0.8 minimum. Optional 0.55 minimum.
Weight
35 lb (15.9 kg).
Agency Approvals
UL.
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