D E S C R I P T I O N
The T10 float level switch offers industrial and municipal users a low-cost solution to wide differential level applications. The moving ballast causes a flipping motion of the float to provide positive switching action even under turbulent conditions. Recommended for use in either clean or dirty liquids, it is ideal for use in sump control, wetwell applications and pilot systems.
Pump Customer Supplied Control
1⁄ 2 differential band
F E A T U R E S
• Differential band 20, 40, or 60 feet (determined by cable length) • May be wired for automatic fill or empty cycles • Dry contact switch mechanism • Cable CSA (SJTO) approved • Switch chatter eliminated with moving ballast • Single float with simple control circuit eliminates theneed for latching devices or double switching with two units • Specific gravity range of 0.6 to 1.5 • Positive switching action—even in turbulent conditions • Cable anchoring point protected by adjustable strain relief • All PVC exposed components make it resistant to water-based chemicals • Mounts easily by cable tie (included) or optional cable weight
20, 40, or 60 ft. (6, 12, or 18 m)differential band
1⁄ 2 differential band
A P P L I C A T I O N S
• Water and wastewater • PVC compatible caustics • PVC compatible chemicals • PVC compatible acids
S P E C I F I C A T I O N S
Switch type Process temperature Ambient temperature Specific gravity Differential band Materials of construction Cable size Non-inductive switch ratings SPDT dry contact +140° F (+60° C)maximum +32° to +140° F (0° to +60° C) 0.6 minimum / 1.5 maximum 18 inches (457 mm) minimum / 60 feet (18 meters) maximum Polyvinylchloride (PVC) with adjustable neoprene strain relief and butyl cosmetic ring 18 AWG (3 x 1.5 mm) 41 strands 21.00 @ 120 VAC / 21.00 @ 240 VAC 14.00 @ 30 VDC / 0.60 @ 120 VDC / 0.30 @ 240 VDC
P R I N C I P L E
Figure 1 T10 level switches contain a dry contact switchwith a swinging ballast. The cable on the float is anchored in the tank at the midpoint of the differential band. Figure 2
O P E R A T I O N
Figure 2 Figure 3
Figure 4 Contacts have not yet changed state with rise in level. Figure 5 As the highest point of the differential is reached, the cable is again pulled taut, tilting the float, causing the ballast to swing back to itsoriginal position in the float. The float flips, causing the switch contacts to return to their original state. This cycle repeats as the level changes. Figure 6 The differential band equals twice the length of cable from its point of attachment to the strain relief, to the point at which it is anchored. For an alarm function, use a minimum differential band of 18.00 inches (457 mm).
As thelevel falls to the lowest point of the differential, the cable is pulled taut, tilting the float, causing the ballast to swing to the opposite end of Figure 4 the float. The float reacts in a flipping action which causes the switch contacts to change state. The minimum level recommended is 6 inches (152 mm) from the bottom of the vessel. Figure 3 Since the float remains in this position even underturbulent conditions, switch chatter is eliminated.
6.00 (102 mm) minimum
Water rising before the high level point is reached.
Water falling before the low level point is reached.
These photographs show the position of the float with rising and falling liquid level.
M O D E L
N U M B E R S
Model T10-5104-020 is available forquick shipment, usually within one week after factory receipt of a complete purchase order, through the Expedite Ship Plan (ESP)
T10-5104-020 T10-5104-040 T10-5104-060 089-5209-001
Dry contact switch mechanism, 20 ft. (6 m) maximum differential band, 20 ft. (6 m) cable Dry contact switch mechanism, 40 ft. (12 m) maximum differential band, 40 ft. (12 m) cable Dry contact switch mechanism, 60...