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LIQUID MANAGEMENT

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www.henrytech.com

SIGHT GLASSES

The function of a Sight Glass is to provide visual indication of fluid

level or flow within a vessel or piping system.

Applications

Henry Technologies offers three series of NPT Sight Glasses for use in a

variety of refrigeration and industrial applications. The Sight Glasses are

available with Clear Lens, Reflex Lens, and Clear Lens with Floating Ball.

The Clear Lens design allows for unobstructed visual inspection of fluid level

or flow. The Reflex Lens is designed to allow easier fluid level inspection by

appearing dark when liquid is present and light when liquid is absent. The

Float Ball series is also designed to provide easier inspection of fluid level.

The standard Float Ball is made of TPX plastic and will float in an fluid with a

specific gravity greater than 0.85.

Henry Technologies' SG-1000 and SG-1100 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. SG-1200 series Sight Glasses are suitable for use with HFC and

HCFC refrigerants and their associated oils, as well as other industrial fluids

non-corrosive to steel, glass and TPX plastic.

Main Features

Ÿ

NPT connection

Ÿ

Hermetically sealed viewing lens

Ÿ

High pressure rating

Ÿ

Plated steel housing

Ÿ

Three lens configurations for a variety of applications

Materials of Construction

All Sight Glasses feature a plated steel body with hermetically sealed soda

lime glass lens. The SG-1200 series Sight Glasses come standard with a

TPX plastic Float Ball but are available with an aluminum Float Ball by

adding a “C” suffix. (i.e. SG-1208C)

Technical Specifications

Maximum working pressure = 1000 PSI (68.9 Bar)

Allowable operating temperature SG-1000, SG-1100 =

-20°F to +500°F (-29°C to +260°C)

Allowable operating temperature SG-1200 =

-20°F to +300°F (-29°C to +149°C)

Henry Technologies' Sight Glasses are USR and CNR recognized by

Underwriters Laboratories, Inc. Additionally, all Sight Glasses are designed

and registered for use in Canada. Please contact Technical Support at

1-800-627-5148 for CRN details and list of approved provinces and

territories. Sight Glasses can be CE marked in accordance with PED by

adding a “-CE” suffix to the part number. (i.e. SG-1008-CE)

CRN

Part No

NPT

(inch)

Dimensions (inch)

CE

Cat*

CE Cat

Ammonia*

Weight

(lbs)

Clear

Reflex

Clear with Ball

A (hex)

B

C

SG-1004

SG-1104

SG-1204

1/2

0.94

0.96

0.56

SEP

SEP 0.13

SG-1006

SG-1106

SG-1206

3/4

1.12

1.06

0.75

SEP

SEP 0.25

SG-1008

SG-1108

SG-1208

1

1.38

1.32

0.94

SEP

SEP 0.25

SG-1010

SG-1110

SG-1210

1-1/4

1.75

1.38

1.19

SEP CAT II

0.50

SG-1012

SG-1112

SG-1212

1-1/2

2.00

1.41

1.31

CAT I

CAT II

0.50

SG-1016

SG-1116

SG-1216

2

2.50

1.42

1.63

CAT I

CAT II

1.00

*Optional Cat I and II CE models available by adding “-CE” suffix to part number. (i.e. SG-1112-CE)

Installation - Notes

1. Install with socket wrench to avoid glass cracking. An open-end wrench

should not be used.

2. The user must ensure the Sight Glass is installed with appropriate

thread sealant for the application.

3. Full instructions are given in the Product Instruction Sheet, included

with each Sight Glass.

AC

B

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