Really glad to have accurate oil psi and temp! [It’s a] match with previous [EI] installs.
- Customer
Nathan V. from Alaska
- Aircraft
Cessna 172C
- EI Instrument
8am–4:30pm PST M–F
Open Now
Our TR-1 provides exceptional performance, reliability and features. If you need to replace or overhaul an old failing instrument, consider buying one of our TR-1s from a company which has been designing quality aircraft instrumentation for over 40 years. Purchasing our TR-1 is substantially less expensive than overhauling or replacing your old needle gauge. We’re able to make this offer with a money-back guarantee because we’re confident you’ll love the performance, reliability and features these instruments offer.
| Amps | AOA | Bleed Air Temp | Cabin Pressure |
| Diff Air Pressure | EGT | EPR | Fuel Flow* |
| Fuel Level | Fuel Pressure | Hyd | ITT* |
| NG/N1* | NP/N2* | O2 Pressure | OAT |
| Oil Pressure | Oil Temp | TAT | TGT |
| Torque* | TOT | Volts | And More! |
* See Product Page
We offer two package options for our TR-1 instruments: Standard and Premium. The Standard TR-1 package is designed to meet the price point for customers wanting rugged and reliable replacement instruments at a great price. The Premium TR-1 package is targeted for customers that need to minimize AOG time.
Bluetooth Field Calibration Device [FCD-TR-1] (add $600)
TR-1-FF Fuel Flow Instrument – Standard Package
TR-1-FF
$1,700
TR-1-FF Fuel Flow Instrument – Premium Package
TR-1-FF
$2,000
Bluetooth Field Calibration Device – Option
FCD-TR-1
$600

Dimensions
2″ standard round, 4.23″ long
Weight
0.3 Pounds (Instrument Only)
Power Requirements
6 to 55 Volts
Typical: 0.075 amps @ 28 Volts
Dimming
Auto (electric eye) and Manual
Environmental
DO-160G
Internal Storage
1,000 hours, RS232 port (premium only)
Certifications
FAA TSO’d -C43c, -C44c, -C45b, -C47a, -49b, -C55a

Really glad to have accurate oil psi and temp! [It’s a] match with previous [EI] installs.
[I chose EI because of its] reputation [and the] quality and appearance of the instrument.
Pleasure supporting folks with like values.
The layout and quality is impressive.
The display is large and clear. The functions are simple and easy to use. Great purchase decision.
Great service. [I replaced/upgraded] unit in aircraft.
Your products always work great! Great customer service and a quality product that we have used for years.
I really enjoy your products [because they are] simple and easy to use and affordable.
Electronics International is an exceptional company with exceptional products… Oregon company, great products and great people.
Good to go! Excellent instructions and easy install. Outstanding instrument!
Staff appears to be very helpful when assistance is needed in verifying information. Heard good things about it [EI] from personal known aircraft owners.
I won a FP-[5]L and had it installed in my c150. I was/am impressed with the accuracy and ease of operation of the FP. I wanted a new tach and I trust (and verified) that the EI R-1… would be my best choice. I am not a rich man. These instruments are affordable and incredibly accurate. Already planning my next buy from EI.