Beech Customer Responses

Beech Customer Responses

I have the CiES frequency senders, with matching Aerospace Logic gauges.

Working with Aerospace Logic requires patience, but in the end, the result is really spectacular.

Yesterday, at 8500 AGL, I ran both R&L Auxiliary tanks down to 0.0 gals, at 47:35 on the clock, precisely as expected... A few seconds later... Fuel pressure begins to fall, immediately switched back to left main.  

Accuracy... It's a totally new experience. I have two fuel totalizers. One Shadin and one in my G4.  Maybe having accurate fuel gauges is overkill... But it's an overkill that I like. 

The only caveat is that my shop wasn't particularly efficient with the remove / reinstall / remove / final install / calibrate process.   I have ALOT of money tied up in this.   But I don't regret it, and I would do it again. 







For anyone who is considering CiES fuel senders these things are awesome. They are well worth the work to install. I ran all new shielded conductor up to the back of my JPI 930. Finally I have a reliable and consistent fuel measurement in my airplane. 

Wow, who would have thought accurate fuel level was possible.

If your airplane is down for an upgrade I would send your old fuel senders to CiES.   This will insure that the senders are appropriately set up the first time.   Beech in all their wisdom made numerous different senders inverting the bolt patterns on some etc. 

CiES senders can work by resistance, voltage or frequency. I would chose at a minimum voltage if you can, Frequency is even better.
Scott @ CiES knows his stuff.


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The cost to retrofit CiES senders to a pre-74 B55 is around $3200 (plus installation). That may seem "outrageous" but it's only about 50% more than what it costs to have the eight (2 per tank * 4 tanks) senders "overhauled" and my experience with overhauled senders is not very good. At best the overhauled senders will perform as good as when new for a few years which is to say they're accurate to within about +/- 5 gallons.

Properly calibrated the CiES senders appear to be within one gallon.  In a Bonanza with two 40 gallon tanks or a post 1973 Baron there are only four senders so that cost is cut in half.

 IIRC the last time I checked, new (1940s technology based) senders from Beech were around $1,600 each or over four times what CiES charges.

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+1 on the CiES/ Scott Philiben Phan club. There's no better customer service than that provided by Scott. anywhere.

I'm still VERY happy with my CiES senders. You know, when something "just works", you take it for granted.   I don't really give my CiES senders much thought. 

They're underappreciated little heros quietly doing their job. Perfectly. All the time.

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AIRCRAFT FUEL GAUGES THAT YOU CAN TRUST 

"With over 12,000 units now flying, CiES has taken over the OEM fuel level sending field.   Our combination of outstanding quality,  reliability, and accuracy has made CiES the standard and the runaway industry leader for fuel level indication on all aviation platforms, GA, Utility, Rotorcraft for both reciprocating and turbine engine applications " 

Beech Baron Digital Fuel Level Sender Retrofit - Part 5

Beech Baron 55 Fuel Level Senders

We have now produced the Baron 55 Senders.  These senders are fully TSO'd and presented our largest challenge to date as each sender had a unique peculiarity.

We will wait for confimation in the aircraft that all is well as we did for the Beech 58 senders we completed two weeks ago 

We are looking forward to this system in the aircraft as it represents a chance for us to utilize our capability of giving a multiple tank system, Mains and aux tanks accurate fuel level.

Stay tuned for further updates and pictures.

Beech Baron Digital Fuel Level Sender Retrofit - Part 3

Beech Baron 58 Fuel Level Senders

We have now digitized the Baron 58 Senders.  For the Baron 58 we have gone ahead with part production for top mount senders and only needed to establish the arm lengths to complete this design.   As we produce the arms in house - this gave us the shortest time to achieving a TSO Baron Fuel Sender for our customer.

All dimensions for these new senders  were captured from a legacy set of Beech Baron Fuel Level senders.  As our design constraints are different from the legacy senders - there is a little bit to getting the right geometry in the tank 

We are looking forward to this system in the aircraft as it represents a chance for us to utilize our capability of summing multiple senders to achieve a single fuel tank output 

One of the interesting items that came up in investigation is that every legacy Outboardd bottom mount Beechcraft Baron 58 Fuel Sender has a seemingly factory grind mark on the housing and screw  - Clearance ?

Stay tuned for further updates and pictures.

Beech Baron CiES Magnetic Fuel Level Sender Retrofit - Part 2

Beech Baron 58 Fuel Level Senders

We received a another set of Beech Baron fuel level senders today.  In the coming days we will quantify the major characteristics of these senders like the arm length and position so that we can make new CiES Digital Magnetic Field Senders.  This set presents a challenge as we need to combine three senders into 1 output.   

These three inputs will accurately read the volume in the Beech 58 Baron fuel tanks   

Stay tuned for further updates and pictures.

Beech Baron CiES Magnetic Fuel Level Sender Retrofit - Part 1

Beech Baron 55 Fuel Level Senders

We received a set of Beech Baron fuel level senders yesterday.  In the coming days we will quantify the major characteristics of these senders like the arm length and position so that we can make new CiES Digital Magnetic Field Senders to accurately read the volume in the Beech Baron fuel tanks - Both the Main and Aux.  

Stay tuned for further updates and pictures.

Beech Bonanza Fuel Level Senders

Beech Bonanza Fuel Level 

CiES is rapidly expanding the number of aircraft that can utilize our Fuel Level Sender technology.   Today we delivered the first set of Beech Bonanza / Debonair fuel level senders.   

This set replaces the Beech original equipment Leigh senders still found in the aircraft.   The old senders had long ago given up on providing accurate fuel level. 

These new fuel level sender utilize non contact, wear free magnetic field technology to locate the float in the tank.  The technology found in CiES Senders is similar to that in your cell phone for it's compass operation.  But instead of pointing North in the compass example, the sensor in the CiES Sender points to the float and to an accuracy less than a 1/4 of a degree.  It does this accurately and repeatably.  You trust your compass to always point North - you'll trust this sender to always tell you how much fuel is in the tank.

The old rusty senders depicted in the pictures utilized continuous wearing potentiometers typically found in legacy General Aviation fuel tanks.  

Potentiometer senders have an in aircraft life of approx. 10 to 12 years before replacement or rebuild.  

You should'nt fly with fuel level senders that are 30 to 40 years past their functional life, Now you don't have to