I have used your products in every airplane that I have owned over the years and have never had a problem. Thank You
- Customer
Gregory V. from New Hampshire
- Aircraft
Cessna A185F Skywagon and AgCarryall
- EI Instrument
8am–4:30pm PST M–F
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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 one package option for our TR-1 instruments: Premium. 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-NP-P Premium Package
TR-1-NP-P
$2,400
$300 Rebate
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
Certifications
FAA TSO’d -C43c, -C44c, -C45b, -C47a, -49b, -C55a

I have used your products in every airplane that I have owned over the years and have never had a problem. Thank You
The installation was straightforward and quite easy. Reliability and accuracy far exceed the original [aircraft’s] oil pressure/temperature systems. Also, the price was about a third of the cost to replace the gauge cluster.
The display is large and clear. The functions are simple and easy to use. Great purchase decision.
Always a pleasure to do business with EI. Products ship rapidly. I have been using your products for 20+ years.
I like how the kits ship with everything needed for install and the wire labeling was very helpful.
We have other EI products currently and have always been satisfied.
Easy install, good product. [I chose EI because of my] experience with [the] product.
[I chose EI because they offer a] certified replacement vs. back-up only and they look great.
Easy installation.
I have never had an issue with any EI products… it looks fantastic on the panel.
Fantastic customer support!
Currently have multiple EI Instruments in our aircraft. Quality and reliability are key.