Gems Sensors Inc.Gems Sensors Inc.
Gems Sensors Inc.Gems Sensors Inc.
Gems Sensors Inc.
One Cowles Road
Plainville, CT 06062-1198
Toll-Free: 1-800-378-1600
Return PolicyReturn Policy
Return PolicyReturn Policy
Return Policy
Returns are accepted on stock items up to 30 days from date of order. You must contact our Returns Department for a Return Authorization
(RA) number. Return the goods - freight prepaid - in the original container and include original packing slip. C. O. D. returns are not
accepted. Gems reserves the right to apply restocking charges.
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el: 860-793-4357el: 860-793-4357
el: 860-793-4357el: 860-793-4357
el: 860-793-4357
Fax: 860-793-4563Fax: 860-793-4563
Fax: 860-793-4563Fax: 860-793-4563
Fax: 860-793-4563
• Gems products must be maintained and installed in strict accor-
dance with the National Electrical Code and the applicable Gems
product instruction Bulletin that covers installation, operation and
proper maintenance. Failure to observe this information may result
in serious injury or damages.
• For hazardous area applications involving such things as, but not
limited to, ignitable mixtures, combustible dust and flammable
materials, use an appropriate explosionproof enclosure or intrinsi-
cally safe interface device.
• Please adhere to the pressure and temperature limitations shown
throughout this catalog for our level and flow sensors. These
limitations must not be exceeded. These pressures and tempera-
tures take into consideration possible system surge pressures/
temperatures and their frequencies.
• Selection of materials for compatibility with the media is critical to
the life and operation of Gems products. Take care in the proper
selection of materials of construction, testing is required.
• NSF-approved sensors are made of materials approved for potable
water applications according to Standard 61.
• Stainless steel is generally regarded as safe by NSF and FDA.
• Life expectancy of switch contacts varies with application. Contact
Gems if life cycle testing is required.
• Ambient temperature changes do affect switch set points, since the
gravity of a liquid can vary with temperature.
• Our sensors have been designed to resist shock and vibration.
However, shock and vibration should be minimized.
• Filter liquid media containing particulate and/or debris to ensure the
proper operation of our products.
• Electrical entries and mounting points in an enclosed tank may
require liquid/vapor sealing.
• Our sensors must not be field-repaired.
• Physical damage sustained by product may render it unserviceable.
Important Points:Important Points:
Important Points:Important Points:
Important Points:
DimensionsDimensions
DimensionsDimensions
Dimensions
1/2” NPT Ports1/2” NPT Ports
1/2” NPT Ports1/2” NPT Ports
1/2” NPT Ports
3/8” NPT Ports3/8” NPT Ports
3/8” NPT Ports3/8” NPT Ports
3/8” NPT Ports
3/8” T3/8” T
3/8” T3/8” T
3/8” T
ube End Compression Fittingube End Compression Fitting
ube End Compression Fittingube End Compression Fitting
ube End Compression Fitting
4.02”
(102 mm)
11/16” HEX
FLOWFLOW
FLOWFLOW
FLOW
↑
←
1.13”
(29 mm)
0.86”
(22 mm)
→
↓
FLOWFLOW
FLOWFLOW
FLOW
7/8” HEX
4.0”
(102 mm)
1.25”
(32 mm)
↑
↓
FLOWFLOW
FLOWFLOW
FLOW
3/4” HEX
3.45”
(88 mm)
1.00”
(25 mm)
0.85”
(22 mm)
↑
↓
←
→
This product is suitable for Class I and Class II applications only, per the requirements of standard EN60730 and any additional specific
requirements for a particular application or medium being sensed. Class I compliance of metal bodied units requires a ground connection
between the metal body and the earthing system of the installation. Class I compliance of plastic bodied units in contact with a conductive
medium requires that the medium be effectively earthed so as to provide an earthed barrier between the unit and accessible areas. For
Class III compliance, a supply at safety extra-low voltage (SELV) must be provided. Please consult the Factory for compliance information
on specific part numbers.
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