I like how the kits ship with everything needed for install and the wire labeling was very helpful.
- Customer
Nathan V. from Alaska
- Aircraft
c-150
- EI Instrument
S-300 External Shunt
FAA Approved Accessory
- PMA’d
- 300 Amp
- 3.25″ (W) x 1.75″ (D) x 1.75″ (H)
- 11.5 Oz Unit
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Product Overview
Prices
Retail Prices
Package includes:
- S-300 Shunt
- Installation Instructions
Description
Package
Retail Price
S-300 External 300 Amp Shunt
S-300
$60
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Testimonials
Customer Testimonials
I have never had an issue with any EI products… it looks fantastic on the panel.
- Customer
Thomas A. from Oklahoma
- Aircraft
Beechcraft Bonanza E35
- EI Instrument
EI’s products are the only ones we recommend to our customers.
- Customer
Hugo T. from Florida
- Aircraft
Cessna 177B
- EI Instrument
The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
- Customer
Daniel N. From California
- Aircraft
Cessna 175 Skylark
- EI Instrument
Great product. [I chose EI because] you have no competition.
Works Great! Love it!
We have other EI products currently and have always been satisfied.
The older EI ultimate engine analyzer that came with my plane that I bought 7 years ago has always worked flawlessly.
Great Product, that provides a lot of very helpful engine data in an easy to use and see display! We are already finding cylinder cooling issues that we would’ve never known about before, and probably explains why we’ve had to replace that specific cylinder in the past. EI customer service on questions on how we wanted to set ours up was very helpful and positive. The CGR-30 had quite a few positive reviews online from other users.
- Customer
Ryan O. from North Dakota
- Aircraft
Cessna 182D
- EI Instrument
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.
- Customer
Casey R. from Oklahoma
- Aircraft
Cessna 172M
- EI Instrument
Always built well. Always dependable. Been using & relying on EI equip for over 35 years!
Very accurate readings! The “analog” style LED arc means at-a-glance tach readings that allow the pilot to keep his attention where it matters, not reading a gauge. The digital readout is great for maintenance checks and mag drop tests.
- Customer
David K. from New Mexico
- Aircraft
Cessna T20N Turbo Centurion II
- EI Instrument