6-3/4
[171.45]
Ø5-3/4
[146.05]
4 [101.60]
CLEARANCE
FOR COVER
REMOVAL
3/4
FEMALE
NPT
ELEC.
CONN.
18-5/8
[473.08]
3-1/4
[82.55]
10-15/16
[277.83]
3-3/4
[95.25]
1 FEMALE NPT
PROCESS
CONNECTION
TYP 2 PLACES
B
A
SP.GR
*A
1.0
6-3/4˝(171mm)
0.6
7-1/2˝ (191 mm)
*A is adjustable ±1˝ (25.4 mm)
Series
201
B
3/4˝ (19 mm)
1˝ (25.4 mm)
Side Mounted-Chamber Type Level Control
Operating Pressures to 500 PSIG, 34 bar, Hermetically Sealed
Snap Switch Option
Model 201 liquid level control is designed for long life and reliable operation in chemical plants, refineries
and industrial facilities. SS switching mechanism uses gravity return action instead of springs to prolong life.
Weatherproof enclosure is standard. Heavy duty, welded steel float chamber is suitable for 500 psi at 750°F.
SPECIFICATIONS
Service: Compatible liquids.
Wetted Materials: Body: Carbon steel. Optional
316 SS; Float and trim: 303 SS, 304 SS, 316 SS,
and 430 SS. Options of 316 SS and 430 SS or all
316 SS.
Temperature Limit: Process: 750°F (399°C). Heat
fins should be used for process temperatures
above 500°F (260°C) with mercury switches, 400°F
(204°C) with snap switches, and 350°F (176.7°C)
with hermetically sealed snap switches.
Pressure Limit: 600 psig (41 bar) at 100°F
(37.7°C), 500 psig (34 bar) at 750°F (399°C).
Higher ratings available.
Enclosure Rating: NEMA 4X (IP66). 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.
Model
201-WT-4810-C1-60
201-WT-7810-C1-60
201-WT-7810HM-C1-60
Switch Type
SPDT Mercury
SPDT Snap
SPDT Hermetically Sealed Snap
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 @ 125 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: 1˝ female NPT and 1˝
socket weld hub. Optional flange connections.
Mounting Orientation: Vertical.
Set Point Adjustment: ±1˝ (25.4 mm).
Weight: 33 lb (14.97 kg).
Agency Approvals: UL (None on HM switch)
Specific Gravity: 0.6 minimum.
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