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From $22.75 to $189.95
Description Part No. Price Buy
Standard 1 set point, PF or FM mounting
Standard 2 set point, PF or FM mounting
Standard 5 set point, PF or FM mounting
Standard SAE 5-hole flange mounting kit
Advanced NPT fuel probe
NPT-Electronics module
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Easy Push Button Calibration - Simple push buttons make calibration easy and accurate.

Intended for Experimental Aircraft - This is not a certified unit

No sensitive screw adjustments to make. Place the probe in tank,
connect power and press EMPTY. Fill tank and press FULL. Calibration is

Steady Readings - Digital filtering minimizes the effects of fuel slosh
providing greater accuracy.

Proven Design - Specifically designed for aircraft that are subject to harsh
environments, such as vibration, temperature, and electrical noise. Probes
designed for industrial applications can fail under these conditions. Proven
reliability with over 10 years of history.

SAE 5 Hole Bolt Pattern - Industry standard flange mount compatible.

Unique Press fit installation option - Simply drill a 1/2" hole and use a
rubber bushing to seal and hold the probe in place.

No Moving Parts - Nothing to wear out.

Output - 0 to 5 Volts

Compatible Fuel Quantity Gauges - UMA P/N: 18-260-1C1 (P/N 10-02410)
Westach P/N: 20A4V (P/N 10-01255) & 2A7V (P/N 10-01246) and other 0-5V gauges.

Standard Model - Round puck with SAE 5 Bolt Pattern and Press-fit Nipple.
Available with 2 or 5 set points. 5 set points are used for odd shaped
tanks. Probes can be shortened to 3 inches of measurable length. Optional 3
or 5 inch bendable section starting at the probe. The bend section does not
measure fuel. Standard overall lengths 12, 18 and 24 inches, bend section
reduces measureable portion. Custom lengths from 25 to 48 inches with a 2
week lead time. Includes a SAE 5 hole rubber gasket or Press-fit rubber
bushing, specify when ordering.

Optional Standard SAE 5-Hole Bolt Pattern Mounting Kit - Contains a backing
plate with taped holes, gasket, AN3H-12A bolts, and washers.

Advance NPT Model - 1/8" Male NPT Fitting, separate 5 set point electronics
using FAKRA SMB connectors. Standard lengths of 24 and 48 inches without any
bend section. Ordering bend section requires special consideration for
mounting. The NPT fitting is not removable. Usually a second compression
fitting is used. Custom lengths 6 to 92 inches with a 2 week lead time.

Ordering Standard Model: (LL-BB-SS-MM)
LL - Length (12, 18, 24 inches or 25 to 48 inches custom)
BB - Bendable Section (NB= non-bendable, 3B= 3 inch, 5B= 5 inch)
SS - Set points (1S= Empty, 2S= Empty/Full or 5S= Empty,1/4,1/2,3/4,Full)
MM - Mounting method (PF= Press Fit Bushing, FM= Flange Mount Gasket)
Example: A 12", non-bendable, 2 set point probe using a press fit mounting
part number would be 12-NB-2S-PF

Ordering Advanced NPT Model: (LL-BB-SS-NPT)
LL - Length (6 to 92 inches) note: only 24 and 48 inch lengths without any
bend section are stocked.
BB - Bendable Section (NB= non-bendable, 3B= 3 inch, 5B= 5 inch)
SS - Set points (1S = Empty, 2S= Empty/Full, 5S= Empty,1/4,1/2,3/4,Full)
NPT = Mounting method 1/8" National Pipe Thread, this is the only option.

Note: 1S is for computer based displays.



Had one of these on a used aircraft I purchased. It was not working. Emailed the company to get some info, and they offered to replace it. I emailed back that I was not the original owner. They said Lifetime Warranty, give us your shipping address. New unit in the mail, installed, calibrated in a few minutes, working every since, about four years. Cant beat the unit, or the company!

Danal E
October 11, 2017

Installed, worked fine for a few days then, had to recalibrate. Recalibrated again. Now not working again. Recalibrating for the fourth time. If it doesnt work this time I will pull the wing off and try something else.

February 6, 2017


Q: Is it possible to install the Princeton sender on the bottom of the tank (upside down)?

Yes, per the installation manual you can mount on the bottom of the tank.

Q: Can the Princeton sender be used in a 24 volt electrical system?

Per the manual you can use 10 to 28 volt system.

Q: Are there any issues interfacing the Princeton probes with the Dynon Skyview System?

Dynon recommends using a capacitive type probe for the Skyview so this will work.

Q: Are the Princeton probes cutable?

No, for an exact length, please email us the part number you want and the length and we can quote you the special order probe.

Q: Can the Princeton Capacitance Fuel Probes touch the side of a poly tank?

Per the manufacturer, This would be fine.

Q: Will PN: 10-00257 work with the ISS fuel level gauge?

As the Princeton Capacitance Fuel Probes are of the capacitance type, they will not work with the ISS fuel level gauge.

Q: We are interested in bendable probes and which are also cuttable.

For an exact length, please email us the measurements for the exact part number you want we can send you a quote. We can also try to find a suitable bendable one with the manufacturer.

Q: Is part number 10-00258 capacitance type? What is PF or FM mounting?

Part Number 10-00258 is the capacitance type. For the mounting method (PF= Press Fit Bushing, FM= Flange Mount Gasket).

Q: Is the 05-01039 bushing a suitable replacement for the busing included with the princeton probe?

Yes, it is a suitable replacement.

Q: Will the Princeton senders work if connected to the Electronics International FL-2CA Capacitive Fuel Gauge ?

Per the manual this will only work with gauges 0-5V which is FL-2, part # 11-03789.

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