LL-01 Series – Relay Version
LL-01 Series Relay Version www.meas-spec.com February 2014
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Proven ultrasonic technology combined with
microcontroller
Improved performance in aerated liquids
Cost effective design for tight spaces and
direct replacement of electro optical and
mechanical float switch
DESCRIPTION
The LL-01 series Ultrasonic Sentio Miniature Liquid Level Switch uses proven ultrasonic technology combined
with a micro controller yielding improved performance in aerated liquids.
FEATURES APPLICATIONS
Standard Features
Pump protection
High pressure up to 250 PSIG (1724 Kpa)
Storage tanks
Output: Relay output, 0.5 amp SPST (normally
open)
Compressors
Medical and laboratory equipment
No moving parts, easy to install
Hydraulic supply lines
Input 5 to 30 VDC
Oil film detection
Digital filter techniques enhance performance
Coolant reservoirs
Boiler water cutoff
Optional Features
Sewage systems
3.3 volt input power
Pipe lines
Electropolishing
Hydraulic and lube reservoirs
Higher pressure up to 500 PSIG (3447 Kpa)
Chillers
Relay output, 0.5 amp SPST (high level failsafe)
PERFORMANCE SPECIFICATIONS
Parameter
Typical Value
Parameter
Typical Value
Repeatability
2 mm or better
Sensor Material
316L SS
Delay
0.5 seconds
Temperature
-20 to +176° F (-29 to 80 °C)
Input Power
5 to 30 VDC
Operating
Pressure
Up to 250 psig (1724 Kpa)
Leakage
Current
Less than 50
Mounting
Output
(standard)
Relay Output: 0.5 amp SPST (normally
open or normally closed); 30 VDC max
Cable Length
Protection
Transient, reverse polarity
LL-01 Series – Relay Version
LL-01 Series Relay Version www.meas-spec.com February 2014
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MECHANICAL DIMENSIONS in inches [mm]
Figure 1: Top - LL-01 series element with 1/4" NPT sensor mounting
Bottom - LL-01 series element with 1/2" NPT sensor mounting
LL-01 Series – Relay Version
LL-01 Series Relay Version www.meas-spec.com February 2014
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TYPICAL WIRING DIAGRAM
Figure 2: Typical wiring diagram for LL-01 series elements
ORDERING INFORMATION
TECHNICAL CONTACT INFORMATION
North America
Europe
Asia
Measurement Specialties, Inc.
1000 Lucas Way
Hampton, VA 23666
Tel: 1-800-745-8008
Fax: 1-757-766-4297
Sales: piezo@meas-spec.com
MEAS Deutschland GmbH
Hauert 13
44227 Dortmund
Germany
Sales & Customer Service: +49 (0)231 9740 21
Technical Support: +44 (0)138 38700 01
Email: piezoeurope@meas-spec.com
Measurement Specialties (China) Ltd.
No. 26 Langshan Road,
High-Tech Park (North)
Nanshan District, Shenzhen 518057
Tel: +86 755 3330 5068
Email: sales.china@meas-spec.com
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice to any product herein. Measurement
Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
applications. All operating parameters
Specialties, Inc. does not convey any license under its patent rights nor the rights of others.
Temperature
1 80° C, normally open
2 100C, normally open
3 80° C, normally closed
4 100C, normally closed
Sensor Material
A 316L SS
LL01 - A
Cable Length
01 1 foot
04 4 feet
10 10 feet
20 20 feet
Sensor Mount and Activation Point
A
B point
