sect.
15 1010629
rev. 2014/10/25
Liquid Level Switches
MLS Series
MLS Series Liquid Level Switches are float activated to
operate an electrical SPDT reed switch for annunciation/
pilot signal for indication of high level to an annunciator,
controller or PLC. The MLS connects directly into the
gas scrubber wall and can be used with a Murphy weld
collar or Murphy external float chamber. The MLS Series
is available in both 1 1/2 and 2 in. NPT models.
Features of the MLS Series includes:
• Clean magnet design virtually eliminates iron filing
accumulation on the magnet Specifications
• Seal-free construction
• ANSI/ISA 12.27.01 compliant (Single Seal) Process Connection: 2” NPT (MLS-020); 1-1/2” NPT (MLS-015)
• Operates in 0.50 specific gravity or heavier fluids Fluid Density (SG):
• Designed for harsh gas compressor scrubber 0.50 MIN (no extension)
applications 0.65 MIN (1 inch extension)
• 304 cast equivalent SS body and 304 SS float Pressure Rating: 2000 psig (13.8 MPa) [138 bar]
• Rated for 2000 psi (13.8 MPa) [138 bar] working Body: ASTM A351 CF8 (304 SS)
pressure Cover: ASTM A351 CF8 (304 SS)
Other Wetted Parts: 303, 304 and 316 SS
• Trip on rising and falling without need to rotate body
Process Temperature: -20° to 300° F (-29° to 149° C)
• Electric model only available Electrical: 30VAC/VDC 75mA Form C SPDT
• All models screw directly into the scrubber or can be Conductor cross section AWG/kcmil min.: 26
mounted via a Murphy External Float Chamber Conductor cross section AWG/kcmil max.: 16
• CSA C/US Class I, Div. 1, Grp. B, C & D locations Canadian Registration Number: 0F12013.2 C (all provinces and
• Canadian registered territories)
Dimensions
In order to consistently bring you the highest quality, full-featured products, we reserve the right to change our specifications and designs at any time. MURPHY products and the Murphy
logo are registered and/or common law trademarks of Enovation Controls, LLC. This document, including textual matter and illustrations, is copyright protected by Enovation Controls, LLC,
with all rights reserved. (c) 2015 Enovation Controls, LLC. A copy of the warranty may be viewed or printed by going to http://fwmurphy.com/warranty.
Electrical Wiring
How to Order
Part Number Description Notes
15700840 MLS-015 1-1/2 in. NPT
15700839 MLS-020 2 in. NPT
15700799 External Float Chamber Operating Pressure: 2000psi (13.8MPa) [138 bar]
15050375 Weld Collar Operating Temperature: 400°F (204°C)
15000892 1-inch Float Extension Kit
Approximate Shipping Weight: Approximate Shipping Dimensions:
MLS-015: 5 lbs. (2.27 kg) MLS-015 and MLS-020: 14 x 5 x 3.5 in. (356 x 127 x 89 mm)
MLS-020: 5.5 lbs. (2.49 kg)
External Float Chamber: 18 lbs. (8.2 kg)
Weld Collar: 6 lbs. (2.7 kg)
Refer to MLS installation and operation manuals for additional information.
