Gems SureSite series Installation and operating instructions

Bulletin No.177664-2
Rev. D
SureSite®Magnetic Liquid Level Indicator
Installation, Operation and Maintenance
Section 2: Switches
Operation
The SureSite Switch Module, available for use with the SureSite Magnetic Liquid Level Indicator, is a sealed assembly
containing a magnetically actuated “latching-reed” switch assembly. The reed switch is actuated by the movement of
the magnet contained in the SureSite float. The design of the reed switch permits the switch module to perform as
either a “normally open” or “normally closed” switch. When installed with the lead wires (or junction box) installed at
the top, the switch module is “normally open” and the reed switch will close with the rising fluid level in the tank;
remaining closed until a falling fluid level in the tank causes the float to drop below the indicating position, opening the
reed switch. When installed with the lead wires (or junction box) at the bottom, the switch module is “normally closed”
and the reed switch will open with the rising fluid level in the tank, and remain open until a falling fluid level in the tank
causes the float to drop below the indicating position, closing the reed switch. (See sketches below)
For electrical schematics of the switch module, please refer to the Wiring Diagrams, located on pages 5 and 6.
Installation
General: The SureSite switch module must be mounted 180° opposite the flag assembly of the SureSite Magnetic
Level Indicator and within its operating range. The installation of the switch module varies, depending on the switch
module housing and the type of SureSite Magnetic Level Indicator. The chart on the next page is intended to provide
an overview of the various switch modules and to indicate which diagram(s) should be referred to for installation
instructions.
- Normally Open Operation - - Normally Closed Operation -
Lead Wires and Junction Box Positioned at Top Lead Wires and Junction Box Positioned at Bottom
Note: Do not use external magnet to test switch modules. Only use a Gems SureSite float assembly.

Installation (Cont.)
If it is necessary to locate two switch-points close together, two switch modules can be
positioned side-by-side and located 180oopposite of the flag assembly, as shown.
Switch Modules
Part
Number
SureSite
Type
Switch Rating/
Configuration
Max. Fluid
Temp (°F / °C)
Mounting Hardware Switch
Housing
Material
Bracket / Spacer
Block Clamp J-Box
Standard
85350 Standard 20 VA SPST, N.O. or N.C. 300 / 148 N/A N/A N/A Polysulfone
86435 Standard 20 VA SPST, N.O. or N.C. 300 / 148 N/A Included N/A Polysulfone
86567 Mini 20 VA SPST, N.O. or N.C. 300 / 148 N/A Included N/A Polysulfone
87480 Mini / Plastic 20 VA SPST, N.O. or N.C. 300 / 148 N/A N/A N/A Polysulfone
80469 Plastic 20 VA SPST, N.O. or N.C. 300 / 148 N/A N/A N/A Polysulfone
High Temperature
83140 All 20 VA SPST, N.O. or N.C. 750 / 398 Included N/A N/A 316 SS
83150 All 20 VA SPST, N.O. or N.C. 750 / 398 Included N/A N/A 316 SS
84320 All 20 VA SPDT, N.O. or N.C. 750 / 398 Included N/A N/A 316 SS
Explosion-Proof / High Temperature
83100* All 120 VAC, 10 Amp 750 / 398 Included Included Included 316 SS
83110* All 24 VDC, 10 Amp 750 / 398 Included Included Included 316 SS
83120* All 20 VA SPST, N.O. or N.C. 750 / 398 Included Included Included 316 SS
83130* All 20 VA SPST, N.O. or N.C. 750 / 398 Included Included Included 316 SS
84330 All 20 VA SPDT, N.O. or N.C. 750 / 398 Included Included Included 316 SS
* Factory Mutual approved for:
Explosion-proof for Class 1, Division 1, Groups C & D and Class 1, Division 2, Groups B, C & D; Dust ignition proof per Class 2,
Division 1, Groups E, F & G and suitable for Class 3, Division 1, Hazardous Location, Indoors (Ref. File #J.I. 0A8A3.AE). Also
CSA certified for Class 1, Division 1, Groups B, C & D (Ref. Files LR22666-22 and LR22666-24).
Note
For Standard Unit installation instructions, see Mounting Diagram “A”
For all other part numbers listed above, see Mounting diagram “B”, “C” or “D”

- Mounting Diagrams -
Diagram A
 Position the switch module 180° from
the flag assembly and within indicating range.
2. Slide the switch clamp between the flag assembly
and the weldment of your SureSite Magnetic Level
Indicator.
3. With the switch module located at the desired fluid
level, tighten the clamp screw securely; not to exceed
a torque of 10 lb-inches.
4. Connect the switch module leads to the load circuit.
Diagram B
 Position the switch module 180° from
the flag assembly and within indicating range.
2. Slide the tabs of the switch clamps between the
flag assembly and the weldment of the Mini
SureSite Magnetic Level Indicator; wrapping
the retaining screw-end around the upper and
lower stem of the switch, as shown.
3. With the switch module located at the desired fluid
level, tighten the clamp screw securely; not to exceed
a torque of 120 lb-inches.
4. Connect the switch module leads to the load circuit.
Standard SureSite®
Switch
Part Numbers
83100, 83110,
83120, 83130,
83140, 83150,
84320, 84330
Switch
Part Numbers
83150, 84320
Mini SureSite®
J-Box Not
Included
On Type
83140
1-1/4”
O.D.
Tubing
Flag
Assembly
2-1/2”
Ref. Switch
Module
#24 Clamp
(P/N 85576)
-2 Required
1-1/4”
O.D.
Tubing
Flag
Assembly
2-1/2”
Ref.
Switch
Module
#24 Clamp
(P/N 85576)
-2 Required
Switch
Part Numbers
80469, 85350, 86435,
86567, 87480

Mounting Diagrams (Cont.) Alloy SureSite®
Diagram C
 Slide the switch into the support bracket.
 Position the switch module 180° from the flag
assembly and within indicating range.
3. Slide the switch clamp between the switch bracket
and the stem of the switch, then between the flag
assembly and the weldment of your SureSite
Magnetic Level Indicator.
4. With the switch module located at the desired fluid
level, tighten this clamp screw securely, not to
exceed a torque of 120 lb-inches.
5. Connect the switch module leads to the load circuit.
Diagram D Plastic SureSite®
 Slide the switch into the plastic spacer block.
 Position the switch module 180° form the flag
assembly.
3. Slide the tabs of the switch clamps between the
flag assembly and the weldment of your SureSite
Magnetic Level Indicator, wrapping the retaining
screw -ends around the stem of the switch, above
and below the spacer block and the desired indication/
activation level, as shown.
4. With the switch module located at the desired fluid level,
tighten both clamp screws securely, not to exceed a
torque of 120 lb-inches.
5. Connect the switch module leads to the load circuit.
Switch
Part Numbers
83100, 83110,
83120, 83130,
83140, 83150,
84320, 84330
Switch
Part Numbers
83150, 84320
Switch
Part Numbers
83100, 83110,
83120, 83130,
83140, 83150,
84320, 84330
Switch
Part Numbers
83150, 84320
J-Box Not
Included
On Type
83140
Switch
Module
Tubing
or
Pipe
Flag
Assembly
#48 Clamp
(P/N 85577)
Tubing
or
Pipe
Switch
Module
J-Box Not
Included
On Type
83140
P/N 802265
Spacer Block
Flag
Assembly
#48 Clamp
(P/N 85577)
#48 Clamp
(P/N 85577)
Flag
Assembly
Tubing
or
Pipe
Switch
Module
Tubing
or
Pipe
Switch
Module
Flag
Assembly
#48 Clamp
(P/N 85577)
P/N 802265
Spacer Block

Part Numbers
80469, 87480, 85350, 86435, 86567
SPST, N.O. or N.C.
RED
RED
SPST
BLK
Part Number 83100
- Dry Condition -
120 VAC
YELLOW
GREEN
BLUE
ORANGE
BROWN
WHITE
SPST
BLK
Wiring Diagrams
Part Number 83110
- Dry Condition -
24 VDC
BLK
SPST
RED YELLOW
GREEN
BLUE
ORANGE
BROWN
WHITE
RED
SPST
Part Numbers
83120, 83140, 83150
- Dry Condition -
SPST
BLK
2-COND.
CABLE
RED
Part Numbers
84320, 84330 SPDT
- Dry condition / J-Box at Top -
RED
WHT
BLK
3-COND.
CABLE
3‐PIN
TERM.
Part Number 83130
- Dry Condition -
RED
BLK
SPST 3‐PIN
TERM.

Wiring Diagrams (Cont.)
Switch Module Troubleshooting
Condition Possible Cause Solution
Intermittent Switching
or
Not Latching
Positioned Incorrectly Reposition Switch Modules
Switch not in Indicating Range Reposition Switch Modules
Incorrect Mounting Hardware See Appropriate Mounting Diagram
Incorrect Wiring Between
Switch & Load
Correct Wiring
(See Wiring Diagrams)
Positioned Incorrectly Reposition Switch Modules
Switch Not in Indicating Range Reposition Switch Modules
Incorrect Mounting Hardware See Appropriate Mounting Diagram
Incorrect Wiring Between
Switch & Load
Correct Wiring
(See Wiring Diagrams)
Switch Rating Exceeded
Replace Switch
(See Appropriate Rating Diagram)
Switch Not Switching
Switch Remains Open
or
Closed At All times
Gems Sensors & Controls | One Cowles Road | Plainville, CT 06062-1198
Telephone: [phone] | Email: [e-mail] | www.GemsSensors.com
Part Numbers
84320, 84330
- Dry Condition / J-Box at BTM
RED
WHT
BLK
3-PIN
TERM.
3 COND.
CABLE