Products
FPI Sensors manufactures standard and custom liquid level sensors. Our capabilities include single and multi-level float sensors, side mount, leak detection, continuous measurement, field adjustable products and custom applications. We have technology in capacitance, optical sensing and float type switches. We have the ability to modify standard products and to build complete custom designs. Most custom design orders are manufactured in 72 hours.
Click the product thumbnail below to see more information.
Single Level Small
Single Level Medium
Temperature Level Switch
Side Mount Level Switch
Leak Detection
90 Degree
Side Mount
Custom Multi
Level Switch
Optical Level Switch
Capacitance
Single Level Float, Small Size
LS-1000 Series - Small Size and available in a variety of materials - Accurate, Affordable, Reliable and Available for same day shipment. Ideal for small or shallow tanks, tight spaces or for any low-cost, high volume use.
Click Here To View Product Specification Sheet
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Part # | Stem | Float | |
| LS-1000-PP | Poly | Poly | ||
| LS-1000-VV | PVC | PVC | ||
| LS-1000-SS | 316 SS | 316 SS | ||
| LS-1000-SB | 316 SS | Buna | ||
| LS-1000-BB | Brass | Buna | ||
| Call for Stock Availability |
Single Level Float, Medium Size
LS-5000 Series - Medium Size and available in a variety of materials; our products are accurate, affordable, reliable and available for same day shipment. Ideal for small or shallow tanks, tight spaces or for any low-cost, high volume use.
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Part # | Stem | Float | |
| LS-5000-SS | 316 SS | 316 SS | ||
| LS-5000-SB | 316 SS | Buna | ||
| Call for Stock Availability |
Temperature and Level Sensing
LTS-3000 Series - Temperature Level Switch. These units are ideal for use in oils and water when level and temperature switches are needed in a single unit. Many different temperature settings available.
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Part # | Stem | Float | |
| LTS-3000-SS | 316 SS | 316 SS | ||
| LTS-3000-SB | 316 SS | Buna | ||
| LTS-3000-BB | Brass | Buna |
Temperature only switches are available.
Call for Stock Availability
Side Mount Level Switch
LS-4100 Series - Available in stainless steel and polypropylene - Accurate, Affordable, Reliable and Available for same day shipment. These side mount switches work well for small tanks. The polypropylene stainless options make our side mounts compatible with nearly any solution.
Click Here To View Product Specification Sheet
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Part # | Stem | Float | |
| LS-4100-PP | Poly | Poly | ||
| LS-4100-SS | 316 SS | 316 SS | ||
| Call for Stock Availability |
Leak Detection
Available in a variety of materials - Accurate, Affordable, Reliable and built to order in 72 hours. These leak detection units are ideal for interstitial use. They are suitable for water, oils, petroleum, and highly contaminated solutions. Suspend in wells, pipes, sumps etc. for leak detection and liquid monitoring. Optional shielding minimizes the effect of turbulence and helps prevent interference of foreign objects. Additional options include weighted collar, customized lead length, magnets for shavings collection and many more. These leak detection units offer nearly all the options as standard customized liquid level sensors.
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Materials | Options |  |
| Stainless Steel | Protection Shroud | ||
| Brass | Weighted Collar | ||
| PVC | Customized lead length | ||
| Polypropylene | Magnet for shavings collection | ||
| Call for Stock Availability |
90 Degree side mount
Available in a variety of materials - Accurate, Affordable, Reliable and built to order in 72 hours. These side mount units offer nearly all the options as customized float style liquid level sensors. They are suitable for most side mount applications. Select any float type, NPT mounting type, lead arrangement, connectors, housing etc.
Click Here To View Product Specification Sheet
Click Here To View CUSTOM Product Template
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Materials | Options | |
| Stainless Steel | Any Float Type | ||
| Brass | Any Fitting Type | ||
| PVC | Customized lead length or connector | ||
| Polypropylene | |||
| Call for Stock Availability |
Multi Level Customized Level Switch
Available in a variety of materials - Accurate, Affordable, Reliable and built to order in 72 hours.
You need it, we can likely build it. We offer many different materials, mounting methods, float types, lead arrangements, connectors, housing and other special items. We can make units to any length with many different diameters. We have the ability to include compression fittings so the overall length can be minimized for shipping. We can make the units overall length field adjustable. Tell us what you need, we can likely make it.
| Materials | Options | ||
| Stainless Steel | Any Fitting or Flange | ||
| Brass | Many different float options | ||
| PVC | Any length | ||
| Polypropylene | Connector, Housings | ||
| Teflon | Field adjustable legnth. 50 and 100 watt SPST or SPDT switch. |
Any option that is possible we will do.
Float Options
Many of our sensors can be made with any of the following floats. This wide range of products allow FPI to meet most application requirements. Please contact us to see how we can met your requirements.
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Materials Available | Float Specifications |
| Stainless Steel | Dimensions range from ¾” to 3” | |
| BUNA | Cylinder, Spherical and Oblong shapes available | |
| Teflon | Specific gravity ranges from .4 to 2.5 | |
| PVC | Standard Maximum Temperature 250F, special design capable to 400F | |
| Polypropylene | Pressure up to 1000 PSI | |
| Kynar |
Mounting Types
We offer a wide range of mounting options to meet your application requirements. If you do not see what you need, we can probably get it. We are happy to meet your requirements.
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Materials Available | Options |
| Stainless Steel | Sizes range from 1/8" NPT to 2” NPT | |
| Brass | Many SAE sizes available | |
| Teflon | Straight threads from .375” and larger | |
| PVC | Quick Connect couplings | |
| Polypropylene | ||
Connectors, Housings, Accessories
We offer a wide range of leads, cable and connectors or switch termination. We also stock different housings including water tight, Cast Aluminum, Nema 4 and Nema 7 housings. If you do not see what you need, we can probably get it. We are happy to meet your requirements.
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Connectors | Housing | Accessories |
| DIN Connectors | Water Tight | Adjustable fitting | |
| Hirschman Style Connectors | Cast Aluminum | Weight stabilizer | |
| Spade terminals | Cast Iron Nema 4 | Conduit Connection, Centering Disks | |
| Terminal block | Cast Iron Nema 7 | Protection Shroud, Temperature Switch |
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| Cable | |||
Optical Level Switch
Available in a variety of materials - Accurate, Affordable and Reliable
Optical Level Switches are low cost and compact. They are available in metal and plastic housings and with 3/8" NPT or 12MM threads.
These dependable switches provide a low voltage level switching to feed into an electronic control device. These level switches are versatile for most applications and installation is simple and quick.
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Materials | Options |  |
| Stainless Steel | 3/8” NPT or 12 MM threads | ||
| Poly Suflone | Customizable lead arrangements | ||
| Poly Carbon | |||
Capacitance Level Switch and Process Output
Available in lengths up to 65” - Accurate, Affordable and Reliable
Capacitance Sensors offer a relay switch point or a process output (0-5vdc or 4-20ma)
These sensors are very dependable and have no moving parts. Capacitance sensors are versatile for most applications and installation is simple and quick.
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Materials | Options | |
| Stainless Steel Probe | Relay output | ||
| Teflon Insulation (Probe) | Process output | ||
| Ceramic Insulation (Probe) | Variety of mounting fittings | ||
| Plastic Insulation (Probe) | Probe lengths up to 65” | ||