microtuf® II MODEL LS1100
Economy Point-Level Switch

  • Switch on level change of .03 inch without concern for changing temp, density, dielectric constant or chemical composition.
  • Wide operating temperature range -100°F to +390°F (-70°C to +200°C).
  • Wide flow range of .01 to 5 feet per second (fps) in oil, 2.5 fps in water and .1 to 500 fps in gases.
  • Two year workmanship warranty.
  • Free of all moving parts that can stick, coat or fail.
  • New smaller and simpler packaging.



Thermal Differential, Dual RTD Sensors

Process Connection:
Standard 0.75 inch MNPT
Optionally 0.5 inch and larger MNPT and various other process connections such as sanitary and flanges

Insertion Length:
Standard 2.0 inch
Optionally 0.5 inch or greater

Operating Temperature Range:
Standard -100°F to 390°F (-70°C to +200°C)

Materials of Construction:
Standard 316L Series Stainless Steel
Optionally Hastelloy, Monel, Inconel and other exotic

Operating Pressure Range:
Standard to 3000 psia (207 bar)


Standard 90-260 VAC at 4 watts Optionally 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

DPDT Relay contacts rated at 5 amp, 250 VAC with fail safe capability

Integral and Automatic during power up.


Operating Range:
Flow: Adjustable Flow Rate (feet per second – fps), typical: 0.01 to 5.0 fps oil, 2.5 fps water and 0.1 to 500 fps gases.
Level: Switch on level change of 0.03 inch

Response Time:
Sensor response time 0.5 to 10 seconds media dependent

Flow: < .5% of set point ± 1% of span over a range of ±50° F, Level: ±1% of setpoint. Temperature compensated throughout entire range

Available Approvals:
None – general purpose areas only