LM Series Liquid Level Multi-Point Switches from Delta M

LM Series Liquid Level Multi-Point Switches from Delta MThe Delta M LM Series Liquid Level Multi-Point Switches deliver precise, reliable level detection at multiple points within a single tank or column—without concern for changing media, temperature, or composition. Engineered for versatility and durability, each switch is custom-built to your specifications, with independent switch points and rugged 316L stainless steel construction. Featuring a self-heating thermal differential sensor design and no moving parts to stick or fail, the LM Series ensures fast, repeatable response times—even in the most demanding industrial environments. With operation up to 850°F (458°C) and pressures to 3000 psia, this solution provides unmatched accuracy, stability, and longevity across a wide range of process control applications.

Detect multiple points of level detection in a tank or column without concern for media or temperature

  • Points and locations determined by customer
  • Switch points are independent of each other
  • Rugged flush Sensor Design
  • Switch on level change of .03 inch
  • Works with all product families (microtuf?, microtuf?II, VERSA-SWITCH?)

Features

LM Series Liquid Level Multi-Point Switch Features

  • Built to suit your specific needs.
  • Number of points and location determined by customer.
  • Switch points are independent of each other.
  • Local or Remote electronics.
  • Removable, plug in electronics.
  • All welded materials of construction 316L Stainless Steel (std).
  • Free of all moving parts that can stick, coat or fail.
  • Fast response time of .1 to 1 second on wetting, media dependent.
  • Switch on level change of .03 inch without concern for changing temperature, density, dielectric constant or chemical composition.
  • Self heating sensor design improves repeatability and reliability. No separate heater to fail or slow response time.
    Wide operating temperature range -100°F to +850°F (-70°C to +458°C).
  • Temperature compensation circuitry eliminates false switching due to process temperature changes.
  • Both the VERSA-SWITCH? and microtuf ? families of multi-point level switches can provide a solution for your demanding point level applications.

Specifications

LM Series Liquid Level Multi-Point Switch Specifications

SENSORS

Type:
Thermal Differential, dual RTD sensors with no separate heater
Process Connection:
Standard 3/4 inch MNPT
Optionally larger MNPT and flanges
Insertion Length:
Minimum 3.5 inches
Optionally Up to 120.0 inches
Operating Temperature Range:
Standard -100 °F to 390 °F (-70 °C to +200 °C)
High Temperature to +850°F (+458 °C)
Medium Temperature to +572°F (+300 °C)
Materials of Construction:
Standard 316L Series Stainless Steel (std)
Operating Pressure Range:
Standard to 3000 psia (207 bar)

ELECTRONICS

Power:
110VAC, 220 VAC, or 24 VDC at 3 watts (No heater power required)
Operating Temperature Range:
Standard -40 °F to +140 °F (-40°C to +60 °C) Optionally remote electronics for use in medium temperature environments
Outputs Per Switch Point:
Independent relay DPDT, contacts rated at 5 amp, 250 VAC with ability to set fail safe mode
Self-Test:
Integral and automatic during power up
Enclosure:
Choice of local explosion proof with; NEMA 3, 4, 4X, 7, and 9; CSA, FM, UL, CENELEC, and EECS approvals or non explosion proof local or remote

INSTRUMENT

Response Time:
Sensor response time 0.5 to 10 seconds media dependent
Response to Level Change:
Will respond to a level change as small as .03 inch.
Repeatability:
±1% of set point

Q & A

Q&A Section with Expand/Collapse Icons

LM Series Liquid Level Multi-Point Switch Q & A

+ How many level detection points can the LM sensor have?
The Delta M LM Liquid Level Multi-Point sensor can be configured with 2 to 6 detection points in a single insertion. The number and locations of these points are determined by the customer based on their specific application needs.
+What materials are used in the construction of the sensor?
The sensor is constructed from 316L stainless steel, ensuring durability and resistance to corrosion in harsh environments. This material choice is standard across all models, providing reliability and longevity in various industrial applications.
+ What is the operating temperature range of the sensor?

The standard operating temperature range for the Delta M LM Liquid Level Multi-Point sensor is from -100°F to +390°F (-70°C to +200°C). For applications requiring higher temperatures, there are medium and high-temperature options available:

  • Medium Temperature: Up to +572°F (+300°C)
  • High Temperature: Up to +850°F (+458°C)

These options allow the sensor to be tailored to the specific thermal requirements of the application.

+ How precise is the sensor in detecting level changes?
The Delta M LM sensor is highly sensitive, capable of detecting level changes as small as 0.03 inches. This high sensitivity ensures accurate monitoring of liquid levels, which is crucial for maintaining optimal process conditions and preventing overflows or dry running scenarios.
 
+What are the available process connection options?
The standard process connection for the sensor is 0.75-inch male NPT (MNPT). However, the sensor can be customized with larger NPT sizes or flanged connections to suit different installation requirements. This flexibility ensures compatibility with a wide range of tank or column configurations.
 

Downloads

Download Delta M Liquid Level Multi-Point Switches Datasheet

Contact us at (855) 737-4714 to learn more or fill out our online form.

 
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