Background Image
Previous Page  93 / 124 Next Page
Information
Show Menu
Previous Page 93 / 124 Next Page
Page Background

LIQUID MANAGEMENT

LIQUID LEVEL SWITCHES

Sight Glass Type

The function of a Liquid Level Switch is to detect and monitor liquid

level in a vessel.

Applications

Henry Technologies' Liquid Level Switches are designed for use in a variety

of refrigeration and industrial applications. The E-Series Liquid Level

Switches are designed to be used with the Herny Technologies' LI-50 Series

Sight Glass. The Sight Glasses and Liquid Level Switches can be installed

on Liquid Receivers, Suction Line Accumulators, compressor crankcases, or

a variety of other applications, to detect and monitor fluid levels.

Henry Technologies' Liquid Level Switches do not come in contact with the

fluid being monitored. However, the LI-50 Series Sight Glasses are suitable

for use with ammonia, HFC and HCFC refrigerants and their associated oils,

as well as other industrial fluids non-corrosive to steel and glass.

Main Features

Ÿ

Patented optical sensor technology*

Ÿ

Installed on existing Sight Glasses

Ÿ

1/2” conduit connection for wiring

Ÿ

High and Low Voltage models

Ÿ

Serviceable without refrigerant loss

Ÿ

Replacement parts available

Materials of Construction

The Level Switch Housing is made of Lucite and is sealed with a synthetic

rubber O-ring.

Technical Specifications

Maximum working pressure LI-50 = 500 PSI (34.4 Bar)

Allowable operating temperature = -40°F to +200°F (-40°C to +93.3°C)

Switch Inductive Rating = 36 VA Pilot Duty Rated

Power for Operation = 3.5 mA AC, 5.5 mA DC

Minimum Load = 2 mA (without bleed resistor)

Henry Technologies' Liquid Level Switches meet the requirements of UL 873

and UL 207 and are USR and CNR recognized by Underwriters Laboratories,

Inc. Additionally, Liquid Level Switches are CE marked in accordance with

PED.

Part No

Connection

Dimensions (inch)

ØA

B

C

E-9400 Series

LI-50-3AR

1.61

2.5

3.26

How it Works

The Liquid Level Switches use light reflecting from a conical glass prism as a

means of detecting the absence of a fluid at the level of the glass cone.

When no fluid covers the lower half of the cone, infrared light from the

module reflects from the mirror-like inner surface of the cone back to a light

detector signaling the electric module to switch. When fluid covers the lower

half of the glass cone, the light from the module passes into the fluid. This

absence of light is detected by the module which switches into the opposite

direction.

Installation - Notes

1. E-9400 Series Liquid Level Switches are installed using and existing

LI-50 Series Sight Glass.

2. The Liquid Level Switch must be installed so that the module is

touching the Sight Glass face.

3. The Sight Glass and Liquid Level Switch must be installed horizontally.

Switches cannot be mounted at an angle or vertically.

4. Wiring diagrams are included with the full instructions given in the

Product Instruction Sheet, included with each unit.

Part No

Voltage

Resistive Rating

(Amp)

Contacts with Liquid

Present

Wire color Code

Replacement

Module

E-9400

120VAC 50/60 Hz

0.5

Closed

Yellow & White

2-044-012

E-9400A

120VAC 50/60 Hz

0.5

Open

Yellow & White/Stripe

2-044-017

E-9420

208/240VAC 50/60 Hz

0.25

Closed

Red & White

2-044-015

E-9420A

208/240VAC 50/60 Hz

0.25

Open

Red & White/Stripe

2-044-018

E-9424

24 V AC/DC

0.5

Closed

Orange & White

2-044-013

E-9424A

24 V AC/DC

0.5

Open

Orange & White/Stripe 2-044-020

Œ

Lucite Body



1/2” Conduit Connection

C

B

Ø

A

2

1

93