Simple and Easy.
- Customer
Aaron H. from Washington
- Aircraft
Cessna 140
- EI Instrument
8am–4:30pm PST M–F
Sorry, We’re Closed
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.
High Torque Transducer (add $380)
High & Low Torque Transducers (add $628)
Bluetooth Field Calibration Device [FCD-TR-1] (add $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

Simple and Easy.
Great company to deal with. Excellent customer service. [I chose this E.I. instrument because it’s] simple and easy to use.
Safety and simplicity!
The display is large and clear. The functions are simple and easy to use. Great purchase decision.
Good equipment at a good price. I have used your products before and have had great success.
Installed digital volt/amp gauge in PA 28-181. Great unit easy to install. Much better than original.
Good value and functionality. I’ve used your instruments on multiple aircraft thru the years with no issues. These are a nice upgrade over the original instruments in most older aircraft.
Straight up install no issues. Works as advertised!
You folks do a great job. Keep up the good work.
We chose your product because of the great support and reputation your company sustains.
Always built well. Always dependable. Been using & relying on EI equip for over 35 years!
Beautiful graphic display, easy to use, perfect automatic dimming!