How to Guide

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All Rights Reserved
Commercial Pressure and Float Switches for Power Circuits
Float Switches—Class 9036, 9037, and 9038
48
03/2011
The center-hole float is used in applications requiring long lengths of tubing and large liquid level
changes. A compensating spring, used for longer lengths of tubing, supports the weight of the tubing
and stops. When a compensating spring is used, the float must be buoyant enough to lift up the switch
lever and heavy enough to trip the switch lever down. The rod has four stops. The position of the stops
on the rod above and below the float determines the amount of water level change.
Temperature Ratings
Electrical Ratings
The following float switches are UL Listed under file E12158, CCN NKPZ:
• Class 9036 Types DG, DW, GG, GW
• Class 9037 Types EG, EW, HG, HW
• Class 9038 Types AG, AW, CG, CW, DG, DW
The following float switches are UL Listed under file E12443, CCN NOWT:
• Class 9036 Types DR, GR
• Class 9037 Types ER, HR
Table 8: Temperature Limitations for all Float Switches
Ambient
Min. –30 °C (–22 °F)
Max. 105 °C (220 °F)
Table 9: Class 9036, 9037, and 9038 Electrical Ratings
Class Type
Single Phase AC Ratings
(hp)
Polyphase AC Ratings
(hp)
DC
(hp)
Control
Circuit
Rating
115 V 230 V 460/575 V 115 V 230 V 460/575 V 32 V 115 V 230 V
9036
D (2 pole) 2 3 — 3 5 1 0.25 0.5 0.5 A600
G (2 pole) 2 3 5 3 5 5 0.5 1 1 A600
G Form H
(1 N.O., 1 N.C.)
1 2 2 — — — — 0.5 0.5 A300
9037 E, H (2 pole) 2 3 — 3 5 1 0.25 0.5 0.5 A600
9038 All (2 pole) 2 3 — 3 5 1 0.25 0.5 0.5 A600
Table 10: Control Duty Circuit Ratings (Form N5 or N25 only)
Contacts
AC—50 or 60 Hz DC AC or DC
V
Inductive,
35% Power Factor
Resistive,
75% Power Factor
V
Inductive and Resistive
Continuous
Carrying
Amperes
Make Break
Make and Break
Amperes
Make and Break Amperes
A VA A VA Single Throw Double Throw
SPDT
Form N5
120 60 7200 6 720 6 120 0.55 0.22 10
240 30 7200 3 720 3 250 0.27 0.11 10
480 15 7200 1.5 720 1.5 600 0.10 — 10
600 12 7200 1.2 720 1.2 — — — —
DPDT
Form N25
120 60 7200 6 720 6 125 0.22 0.22 10
240 30 7200 3 720 3 250 0.11 0.11 10
480 15 7200 1.5 720 1.5 600 — — 10
600 12 7200 1.2 720 1.2 — — — —