20

Switch Description

Process

Temp.

Range

°F (°C)

C

O

N

T

A

C

T

S

Model A15 Codes

Single Set Point

Model B15 Codes

Dual Set Points

TYPE 4X/7/9 Aluminum Enclosure

Cl. I,

Div 1

Groups

C & D

Cl. I,

Div 1

Group B

ATEX

Ex II 2 G

EEx d IIC

T6

Cl. I,

Div 1

Groups

C & D

Cl. I,

Div 1

Group B

ATEX

Ex II 2 G

EEx d

IIC

T6

Series B Snap Switch

–40 to +250

(–40 to +121)

SPDT

BKQ

BKS

BA9

BLB

BLK

BD9

DPDT

BNQ

BNS

BB9

BOB

BOK

BG9

Series C Snap Switch

–40 to +450

(–40 to +232)

SPDT

CKQ

CKS

CA9

CLB

CLK

CD9

DPDT

CNQ

CNS

CB9

COB

COK

CG9

Series D DC Current

Snap Switch

–40 to +250

(–40 to +121)

SPDT

DKQ

DKS

DA9

DLB

DLK

DD9

DPDT

DNQ

DNS

DB9

DOB

DOK

DG9

Series F Herm. Sealed

Snap Switch

–50 to +500

(–46 to +260)

SPDT

FKQ

FKS

FA9

FLB

FLK

FD9

DPDT

FNQ

FNS

FB9

FOB

FOK

FG9

Series HS Herm. Sealed

5 Amp Snap Switch

with Wiring Leads

–50 to +500

(–46 to +260)

SPDT

HMC

HEK

N/A

N/A

DPDT

HMF

HET

Series HS Herm. Sealed

5 Amp Snap Switch

with Terminal Block

–50 to +500

(–46 to +260)

SPDT

HM3

HM4

HA9

DPDT

HM7

HM8

HB9

Series 8 Herm. Sealed

Snap Switch

–50 to +500

(–46 to +260)

SPDT

8KQ

8KS

8A9

8LB

8LK

8D9

DPDT

8NQ

8NS

8B9

8OB

8OK

8G9

M O D E L

N U M B E R

S E R I E S

A 1 5

A N D

B 1 5

F O R

F L O A T I N G

R O O F

D E T E C T I O N

1

PART NUMBER CODE

MODEL SELECTION CHART

TANK CONNECTION

Tank Connection

Code

Connection Type

E2

H2

4" 125 lb. FF cast iron flange

H3

4" 150 lb. RF carbon steel flange

K2

6" 125 lb. FF cast iron flange

K3

6" 150 lb. RF carbon steel flange

DISPLACER MATERIAL AND PROOF-ER OPTION

Part Number Code

Function

Materials of Construction

A15–1

Narrow differential, Single Stage

Carbon steel process connection,

300 series ss trim, 400 series sleeve

B15–1

Narrow differential, Dual Stage

Displacer Type and Material Code

Floating Roof Only

Liquid &

Floating Roof

Brass

Hollow Brass

Œ

PROOF-ER Type

P

R

Without PROOF-ER

Q

T

Low Pressure PROOF-ER

ΠAvailable on model A15 only. Suitable for process liquids with SG greater than or equal to 0.40.