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USER’S GUIDE
LVN-40 & LVN-50 Series
Liquid Level Switch
omega.com | [email protected]
For latest product manuals:
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TM
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CONTACT
Omega Engineering, Inc.
omega.com/contact-us
Toll-Free:
1-800-826-6342 (USA & Canada only)
Customer Service:
1-800-622-2378 (USA & Canada only)
Engineering Service:
1-800-872-9436 (USA & Canada only)
Telephone:
(203) 359-1660
Fax:
(203) 359-7700
Email: [email protected]
For other locations visit:
omega.com/worldwide
The information contained in this document is believed to be correct,
but Omega accepts no liability for any errors it contains, and reserves
the right to alter specifications without notice.
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Table of Contents
1. Important Information ........................................................................................................................................................ 4
2. General Description ............................................................................................................................................................ 5
3. Specifications ....................................................................................................................................................................... 5
4. Single Station Level Switches with “NPT” Mounting ................................................................................................. 6
Table of Contents
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1. Important Information
Product must be maintained and installed in strict accordance with the National Electrical Code and Omega
Instructions. Failure to observe this warning could result in serious injuries or damages.
Caution
The pressure and temperature limitations shown for the specied level switches must not be exceeded. These
pressures and temperatures must take into consideration possible system surge pressures/temperatures and their
frequencies.
The liquids used must be compatible with the materials of construction. Specications of material will be given
upon request. Life expectancy of switch contacts varies with applications. Ambient temperature changes do affect
switch set points, since specic gravities of liquids vary with temperature.
Level switches have been designed to be shock and vibration resistant; however, shock and vibration should be
minimized.
Excessive contaminants in uid may inhibit oat operation and occasional wipe-down may be necessary.
Troubleshooting and maintenance of level switches should be in strict compliance with procedures set forth
in the troubleshooting and maintenance sections of the technical brochure or an installation, operation, and
maintenance bulletin.
Level switches must not be eld-repaired.
Physical damage to product may render product unserviceable.
4 LVN Series User's Guide
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2. General Description
Constructed entirely of 316 SS, the LVN-40 Single Station Level Switch is specically designed to withstand the
effects of a wide range of chemicals. The unit has a maximum operating temperature of 300 °F and can be used
to meet many level control applications, including medical and water purication requirements. Its small oat
displacement permits high accuracy and reliability in shallow tanks and reservoirs.
The LVN-50 Series Level Switches offer superlative performance and dependability under the most severe
operating conditions. The sensor incorporates a larger oat displacement and all stainless steel construction for
consistent level monitoring in liquids pressurized to a maximum 1000 PSIG. Ideal for level sensing in chemical
plants and systems, models are available for temperatures up to 300 °F.
These Switches are sealed with potting compound so that the switches will meet or exceed a NEMA-6 rating,
making them suitable for submersion with years of worry free operation in moisture-laden environments.
Caution
This instrument must not be subjected to temperatures, pressure, or electrical loads exceeding those appearing on
the name plate, and specications listed.
3. Specifications
Stem Material: 316 SS
Float Material: 316 SS
Operating Temperature: -40 to 149 °C (-40 to 300 °F)
Maximum Pressure Rating: 900 psi to 1000 psi
Mounting: 1/8” NPT for the LVN-40 and LVN-50
1/4” NPT for the LVN-52
Switch: SPST
Switch Actuation: Approximately 1/2 the distance from the end of the stem to mounting, or halfway point of the
oat travel.
Lead Wires: 20 awg. 24” PVC
Specic Gravity of Float: LVN-40: 0.72
LVN-50: 0.70
LVN-52: 0.64
5General Description
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4. Single Station Level Switches with “NPT” Mounting
Install units vertically in tank top or bottom using Methods 1, 2, 3, or 4 (below).
Note
Units will operate normally inclined up to 30 °.
Figure 1
Figure 2
Figures 3 and 4
6 LVN Series User's Guide
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Figure 5
Figures 6 and 7
Figure 8
7Single Station Level Switches with “NPT” Mounting
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WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a period
of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month grace period to
the normal one (1) year product warranty to cover handling and shipping time. This ensures that OMEGA’s
customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge.
OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser, including but
not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or
unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered
with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat,
moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside
of OMEGA’s control. Components in which wear is not warranted, include but are not limited to contact
points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA neither assumes
responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its
products in accordance with information provided by OMEGA, either verbal or written. OMEGA warrants only
that the parts manufactured by the company will be as specified and free of defects. OMEGA MAKES NO OTHER
WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser set
forth herein are exclusive, and the total liability of OMEGA with respect to this order, whether based on contract,
warranty, negligence, indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for consequential, incidental or
special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity,
medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set
forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA
and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s)
in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR)
NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING
DELAYS). The assigned AR number should then be marked on the outside of the return package and on any
correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY RETURNS, please have the
following information available BEFORE contacting
OMEGA:
1. Purchase Order number under which the product
was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
FOR NON-WARRANTY REPAIRS,
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords our customers the latest
in technology and engineering.
OMEGA is a trademark of OMEGA ENGINEERING, INC. © Copyright OMEGA ENGINEERING, INC. All rights reserved. This document may not
be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without
the prior written consent of OMEGA ENGINEERING, INC.
consult OMEGA
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