Gems SureSite series, 85350, 86435, 86567, 87480 Installation, Operation And Maintenance Manual

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.

Note: Do not use external magnet to test switch modules. Only use a Gems SureSite float assembly.

Lead Wires and Junction Box Positioned at Top

- Normally Open Operation - - Normally Closed Operation -

Lead Wires and Junction Box Positioned at Bottom

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.

Installation (Cont.)

If it is necessary to locate two switch-points close together, two switch modules can be

positioned side-by-side and located 180

o

opposite of the flag assembly, as shown.

Switch Modules

Part

Number

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

SureSite

Type

Switch Rating/

Configuration

Max. Fluid

Temp (°F / °C)

Bracket / Spacer

Block

Mounting Hardware

Clamp J-Box

Switch

Housing
Material

* 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).

For Standard Unit installation instructions, see Mounting Diagram “A”

For all other part numbers listed above, see Mounting diagram “B”, “C” or “D”

Note

- 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

Standard SureSite

®

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.

Switch

Part Numbers
83100, 83110,
83120, 83130,
83140, 83150,

84320, 84330

Switch

Part Numbers

80469, 85350, 86435,
86567, 87480

Mini SureSite

Flag

Assembly

2-1/2”

Ref.

®

1-1/4”

O.D.

Tubing

1-1/4”

O.D.

Tubing

Switch

Module

#24 Clamp

(P/N 85576)

-2 Required

J-Box Not

Included

On Type

83140

4. Connect the switch module leads to the load circuit.

Switch

Part Numbers

83150, 84320

Flag

Assembly

2-1/2”

Ref.

Switch

Module

#24 Clamp

(P/N 85576)

-2 Required

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.

Switch

Part Numbers
83100, 83110,
83120, 83130,
83140, 83150,

84320, 84330

Switch

Part Numbers

83150, 84320

Flag

Assembly

#48 Clamp

(P/N 85577)

Flag

Assembly

Tubing

or

Pipe

Tubing

Pipe

or

Switch

Module

Switch

Module

J-Box Not

Included
On Type

83140

Diagram D

 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

Part Numbers
83100, 83110,
83120, 83130,
83140, 83150,

84320, 84330

Switch

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

83150, 84320

#48 Clamp

(P/N 85577)

Plastic SureSite®

Flag

Assembly

#48 Clamp

(P/N 85577)

Tubing

or

Pipe

Tubing

or

Pipe

J-Box Not

Included
On Type

Switch

Module

P/N 802265

Spacer Block

83140

Flag

Assembly

(P/N 85577)

#48 Clamp

Switch

Module

P/N 802265

Spacer Block

Part Numbers

80469, 87480, 85350, 86435, 86567

Wiring Diagrams

Part Number 83100

- Dry Condition -

24 VDC

SPST

SPST, N.O. or N.C.

Part Number 83110

- Dry Condition -

RED

RED

RED

YELLOW

GREEN

BLUE

ORANGE

120 VAC

SPST

SPST

BLK

BLK

83120, 83140, 83150

SPST

SPST

Part Numbers

- Dry Condition -

RED

RED

YELLOW

GREEN

BLUE

ORANGE

BROWN

WHITE

2-COND.

CABLE

BLK

Part Number 83130

- Dry Condition -

SPST

BLK

RED

BROWN

WHITE

3‐PIN
TERM.

BLK

Part Numbers

84320, 84330 SPDT

- Dry condition / J-Box at Top -

RED

WHT

BLK

3-COND.

CABLE

3‐PIN
TERM.

Wiring Diagrams (Cont.)

Part Numbers
84320, 84330

- Dry Condition / J-Box at BTM

RED

WHT

3-PIN
TERM.

BLK

3 COND.
CABLE

Switch Module Troubleshooting

Condition Possible Cause Solution

Positioned Incorrectly Reposition Switch Modules

Intermittent Switching

or

Not Latching

Switch not in Indicating Range Reposition Switch Modules

Incorrect Mounting Hardware See Appropriate Mounting Diagram

Switch Not Switching

Switch Remains Open

Closed At All times

Incorrect Wiring Between

Switch & Load

Positioned Incorrectly Reposition Switch Modules

or

Gems Sensors & Controls | One Cowles Road | Plainville, CT 06062-1198

Telephone: [phone] | Email: [e-mail] | www.GemsSensors.com

Switch Not in Indicating Range Reposition Switch Modules

Incorrect Mounting Hardware See Appropriate Mounting Diagram

Incorrect Wiring Between

Switch & Load

Switch Rating Exceeded

Correct Wiring

(See Wiring Diagrams)

Correct Wiring

(See Wiring Diagrams)

Replace Switch

(See Appropriate Rating Diagram)