Gems Single Point Level Switches Float Switches LS-1700 Series
Gems™ Liquid Level Sensors operate on a direct, simple principle. In most models, a float encircling a stationary stem is equipped with powerful, permanent magnets. As the float rises or lowers with liquid level, the magnetic field generated from within the float actuates a hermetically sealed, magnetic reed switch mounted within the stem. The stem is made of non-magnetic metals or rugged, engineered plastics. When mounted vertically, this basic design provides a consistent accuracy of ±1/8 inch. Multi-station versions use a separate reed switch for each level point being monitored.
Side-mounted units use different actuation methods because of their horizontal attitude. The basic principle, however, is the same: as a direct result of rising or falling liquid, a magnetic field is moved into the proximity of a reed switch, causing its actuation.
Reed Switch Reliability
The durable construction of these reed switch designs ensures long, trouble-free service. Because the effects of shock, wear and vibration are minimized, these hermetically sealed switches provide precise repeatability with no more than 1% deviation. The sensor actuation points remain constant over the life of the unit.
LS-1700 Series Level Switch
| tuation Level | 9/16" |
| Switch Operation | Normally Open (Reversible) |
| Min. Liquid | 0.45 |
| Stem Material | Brass |
| Float Material | Buna |
| Float Diameter | 1" |
| Mounting Size | 1/8" NPT Male |
| Mounting | Vertical |
| Switch Type | SPST (20 VA) |
| Input | N/A |
| Output | N/A |
| Maximum Pressure (PSI) | 300 |
| Minimum Temperature (°F) | -40 |
| Maximum Temperature (°F) | 300 |
| Electrical Termination | 22 AWG, 24" long Polymeric leads |
| Wetted Materials | Brass, Buna N, 316 Stainless Steel, Epoxy |
| Approvals | UL Recognized, CSA Listed, CE |
| Minimum Qty (per Release) | 1 |
| Weight (LBS) | 0.125 |
Leak Detection Sensor
| Actuation Level | N/A |
| Switch Operation | Normally Closed (Non-Reversible) |
| Min. Liquid | N/A |
| Stem Material | N/A |
| Float Material | N/A |
| Float Diameter | N/A |
| Mounting Size | N/A |
| Mounting | Horizontal |
| Switch Type | SPST (10 VA) |
| Input | N/A |
| Output | N/A |
| Maximum Pressure (PSI) | 15 |
| Minimum Temperature (°F) | -40 |
| Maximum Temperature (°F) | 176 |
| Electrical Termination | 25' (2) Conductor PVC Jacketed Cable |
| Wetted Materials | Valox, Foamed Polyethylene, PVC |
| Approvals | Ul Recognized, CE |
| Minimum Qty (per Release) | 1 |
| Weight (LBS) | 1.25 |
| Part Number | Stem Material | Float Material | Mounting Size | Switch Type | |
| 1701 | Brass | Buna | 1/8" NPT Male | SPST (20 VA) | |
| 1702 | 316 Stainless Steel | Buna | 1/8" NPT Male | SPST (20 VA) | |
| 1750 | Actuation point for N.C. operation is 3/4" | 316 Stainless Steel | 316 Stainless Steel | 1/8" NPT Male | SPST (20 VA) |
| 1755 | Actuation point for n.c. operation is 53/64" | 316 Stainless Steel | 316 Stainless Steel | 1/8" NPT Male | SPST (20 VA) |
| 1801 | Brass | Buna | 1/8" NPT Male | SPST (20 VA) | |
| 1807 | 316 Stainless Steel | Buna | 1/8" NPT Male | SPST (20 VA) | |
| 1811 | Float is spring biased | 316 Stainless Steel | Teflon | 1/8" NPT Male | SPST (20 VA) |
| 1901 | Brass | Buna | 1/4" NPT Male | SPST (20 VA) | |
| 1907 | 316 Stainless Steel | Buna | 1/4" NPT Male | SPST (20 VA) | |
| 1950 | 316 Stainless Steel | 316 Stainless Steel | 1/4" NPT Male | SPST (20 VA) | |
| 116826 | Polypropylene | Polypropylene (Solid) | 1/8" NPT Male | SPST (20 VA) | |
| 116971 | 316 Stainless Steel | 304 Stainless Steel | 1" NPT Male | SPST (100VA) | |
| 116972 | 316 Stainless Steel | 304 Stainless Steel | 1" NPT Male | SPST (100VA) | |
| 117711 | Stem has 90 degree bend | Brass | 316 Stainless Steel | 1/8" NPT Male | SPST (20 VA) |
| 117712 | Stem has 90 degree bend | 316 Stainless Steel | 316 Stainless Steel | 1/8" NPT Male | SPST (20 VA) |
| 117715 | Stem has 90 degree bend | Brass | 316 Stainless Steel | 3/8-24" | SPST (20 VA) |
| 117716 | Stem has 90 degree bend | 316 Stainless Steel | 316 Stainless Steel | 3/8-24" | SPST (20 VA) |
| 118125 | Stem has 90 degree bend | Brass | Buna | 1/8" NPT Male | SPST (20 VA) |
| 118126 | Stem has 90 degree bend | 316 Stainless Steel | Buna | 1/8" NPT Male | SPST (20 VA) |
| 118127 | Stem has 90 degree bend | Brass | Buna | 3/8-24" | SPST (20 VA) |
| 118128 | Stem has 90 degree bend | 316 Stainless Steel | Buna | 3/8-24" | SPST (20 VA) |
| 121753 | 316 Stainless Steel | 304 Stainless Steel | 1" NPT Male | SPDT (20 VA) | |
| 128500 | Designed for use in Refrigerants | Brass | 304 Stainless Steel | 3/4" NPT Male | SPST (20 VA) |
| 131100 | Polypropylene | Polypropylene | 1/2" NPT Male | SPST (20 VA) | |
| 133299 | Teflon | Teflon | 1/4" NPT Male | SPDT (20 VA) | |
| 138167 | Polysulfone | N/A | 1/4" NPT Male | TTL/CMOS Compatible | |
| 140620 | Nylon | Nylon | 1/2" NPT Male | SPST (20 VA) | |
| 142505 | Polypropylene | Polypropylene (Hollow) | 1/8" NPT Male | SPST (20 VA) | |
| 142545 | Includes Polypropylene Slosh Shield | Polypropylene | Polypropylene (Solid) | 1/8" NPT Male | SPST (20 VA) |
| 142700 | Polysulfone | N/A | 1/4" NPT Male | TTL/CMOS Compatible | |
| 143570 | Polysulfone | N/A | 1/4" NPT Male | TTL/CMOS Compatible | |
| 143575 | Polysulfone | N/A | 1/2" Straight thread | TTL/CMOS Compatible | |
| 143577 | Polysulfone | N/A | "Fish" Pll Ring | TTL/CMOS Compatible | |
| 143580 | Polysulfone | N/A | 1/2" Straight thread | TTL/CMOS Compatible | |
| 143585 | 3/8" Conduit Connection | Polysulfone | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 143590 | 3/8" Conduit Connection | Polysulfone | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 144080 | Aluminum housing for external mounting | Brass | 316 Stainless Steel | 1/4" NPT Femaile Inlet 1/8" NPT Outlet | SPST (20 VA) |
| 144225 | 3/8" Conduit Connection | Polysulfone | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 144235 | Polysulfone | N/A | 1/2" Straight thread | TTL/CMOS Compatible | |
| 144900 | Designed for use in Refrigerants | Brass | 304 Stainless Steel | 3/4" NPT Male | SPST (20 VA) |
| 148973 | Polysulfone | N/A | "Fish" Pll Ring | TTL/CMOS Compatible | |
| 149350 | Weighted for Suspension Cable | Brass | Buna | Bracket | SPST (20 VA) |
| 15208 | Aluminum Housing with intrgral magnet for mounting to tank wall | Brass | Buna | Bracket | SPST (20 VA) |
| 153061 | IspoPlast | N/A | 3/8" NPT Male | TTL/CMOS Compatible | |
| 153062 | IspoPlast | N/A | 3/8" NPT Male | TTL/CMOS Compatible | |
| 153063 | IspoPlast | N/A | 3/8" NPT Male | TTL/CMOS Compatible | |
| 153064 | IspoPlast | N/A | 3/8" NPT Male | TTL/CMOS Compatible | |
| 155660 | When mounted in cathodic metals and used in water based applications, galvanic corrosion may occur. | Zinc Alloy | Nylon | 7/8"-14UNF Male | SPST (20 VA) |
| 156000 | N/A | N/A | N/A | SPST (10 VA) | |
| 157750 | 3/8" Conduit Connection | Nylon | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 160405 | Aluminum housing for external mounting | Brass | Buna | 1/4" NPT Femaile Inlet 1/8" NPT Outlet | SPST (20 VA) |
| 160450 | 1/2" NPT Conduit Connection | Polypropylene | Polypropylene | 1/2" NPT Male | SPST (20 VA) |
| 160460 | 1/2" NPT Conduit Connection | Nylon | Nylon | 1/2" NPT Male | SPST (20 VA) |
| 160950 | When mounted in cathodic metals and used in water based applications, galvanic corrosion may occur. | Zinc Alloy | Nylon | 1/2" NPT Male | SPST (20 VA) |
| 162745 | Nylon | Buna | 1/8" NPT Male | SPST (20 VA) | |
| 162795 | When mounted in cathodic metals and used in water based applications, galvanic corrosion may occur. | Zinc Alloy | Polpropylene | 1/2" NPT Male | SPST (20 VA) |
| 164520 | Internal mounting secured with locking nut | Polypropylene | Polypropylene | Internal | SPST (20 VA) |
| 164850 | 316 Stainless Steel | Nylon | 1/2" NPT Male | SPST (20 VA) | |
| 164860 | 316 Stainless Steel | Polypropylene | 1/2" NPT Male | SPST (20 VA) | |
| 164870 | 316 Stainless Steel | 316 Stainless Steel | 1/2" NPT Male | SPST (20 VA) | |
| 165570 | Internal mounting secured with locking nut | Nylon | Nylon | Internal | SPST (20 VA) |
| 165800 | Externally mounts through and seals non-threaded holes using a HNBR compression gasket | Polypropylene | Polypropylene | Internal | SPST (20 VA) |
| 165900 | Externally mounts through and seals non-threaded holes using a HNBR compression gasket | Nylon | Nylon | Internal | SPST (20 VA) |
| 166541 | Polysulfone | N/A | M12x8g Straight Thread | TTL/CMOS Compatible | |
| 169555 | Polysulfone | N/A | M12x8g Straight Thread | TTL/CMOS Compatible | |
| 169556 | Polysulfone | N/A | M12x8g Straight Thread | TTL/CMOS Compatible | |
| 171514 | Polypropylene | Polypropylene (Solid) | 3/8"-16 | SPST (20 VA) | |
| 171517 | Polypropylene | Polypropylene (Hollow) | 3/8"-16 | SPST (20 VA) | |
| 171518 | Polypropylene | Polypropylene (Hollow) | G 18"-28 | SPST (20 VA) | |
| 172625 | Bottle Switch for External mounting | Brass | 316 Stainless Steel | 3/4" NPT Female | SPST (20 VA) |
| 172635 | Bottle Switch for External mounting | 316 Stainless Steel | 316 Stainless Steel | 3/4" NPT Female | SPST (20 VA) |
| 172986 | Bottle Switch for External mounting | Brass | 316 Stainless Steel | 3/4" NPT Female | SPST (100VA) |
| 172987 | Bottle Switch for External mounting | 316 Stainless Steel | 316 Stainless Steel | 3/4" NPT Female | DPDT |
| 172988 | Bottle Switch for External mounting | Brass | 316 Stainless Steel | 3/4" NPT Female | DPDT |
| 173250 | PVDF | PVDF | 1/8" NPT Male | SPST (20 VA) | |
| 173700 | 3/8" Conduit Connection | Teflon | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 173800 | 3/8" Conduit Connection | Teflon | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 174100 | Teflon | Teflon | 1/8" NPT Male | SPST (20 VA) | |
| 174200 | Teflon | Teflon | 1/8" NPT Male | SPST (20 VA) | |
| 175631 | 3/8" Conduit Connection | Nylon | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 175632 | 3/8" Conduit Connection | Nylon | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 175650 | 316 Stainless Steel | 316 Stainless Steel | 1" NPT Male | SPDT (20 VA) | |
| 177100 | Versaplast | Versaplast | 1/2" NPT Male | SPST (20 VA) | |
| 177818 | Nylon | Buna | 1/8" NPT Male | SPST (20 VA) | |
| 179445 | Internal mounting secured with locking nut | 316 Stainless Steel | 316 Stainless Steel | Internal | SPST (20 VA) |
| 179870 | When mounted in cathodic metals and used in water based applications, galvanic corrosion may occur. | Zinc Alloy | Polypropylene | 7/8"-14UNF Male | SPST (20 VA) |
| 181291 | Polypropylene | Polypropylene | 1/2" NPT Male | SPDT (10 Watt Minimum) | |
| 181674 | IspoPlast | N/A | 3/8" NPT Male | TTL/CMOS Compatible | |
| 181675 | IspoPlast | N/A | 3/8" NPT Male | TTL/CMOS Compatible | |
| 182600 | Versaplast | Versaplast | Internal | SPST (20 VA) | |
| 185600 | Includes Hypalon Boot Cable Seal | Teflon | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 187575 | Maximum Wall Thickness is 1/4" | Polysulfone | N/A | 3/4" Flange | TTL/CMOS Compatible |
| 187580 | Maximum Wall Thickness is 1/4" | Polysulfone | N/A | 3/4" Flange | TTL/CMOS Compatible |
| 187585 | Maximum Wall Thickness is 1/4" | Polysulfone | N/A | 3/4" Flange | TTL/CMOS Compatible |
| 187590 | Maximum Wall Thickness is 1/4" | Polysulfone | N/A | 3/4" Flange | TTL/CMOS Compatible |
| 187595 | Includes Hypalon Boot Cable Seal | Teflon | N/A | 1/4" NPT Male | TTL/CMOS Compatible |
| 189422 | Versaplast | Versaplast | 1/2" BSP Male | SPST (20 VA) | |
| 189739 | Polypropylene | Polypropylene (Hollow) | M12x1.75 | SPST (20 VA) | |
| 189786 | &nb
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