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
8am–4:30pm PST M–F
Sorry, We’re Closed

| Model | PT-30GA | PT-100GA | PT-100GA-T Torque | PT-300GA | PT-3000S |
| Target Pressure | 30 PSI | 100 PSI | 100 PSI | 300 PSI | 3,000 PSI |
| Proof Pressure | 72 PSI | 290 PSI | 290 PSI | 726 PSI | 7,252 PSI |
| Burst Pressure | 108 PSI | 435 PSI | 435 PSI | 1,089 PSI | 10,878 PSI |
| Pressure Type | Gauge | Gauge | Gauge | Gauge | Gauge |
PT-300GA Pressure Transducer
PT-300GA
$248

Type
Gauge Pressure
Target Pressure
300 PSI
Proof Pressure
726 PSI
Burst Pressure
1,089 PSI
Typical Accuracy
+/- 1%
dV (btwn GRN & WHT) @ Target PSI
50 mV
Material
304 SS
Power Supply
+5 VDC
Certifications
FAA TSO’d, STC’d, PMA’d
The OPT-1 is more readable than the factory Cessna oil pressure/temp gauges.
Safety and simplicity!
Simple and Easy.
Works great!
Gauge works great! Very happy with purchase.
Keep it up. I’ll keep coming back.
Easiest company to deal with and an awesome product! Price, Certified for Primary, and Features.
Easy install and great gauges. Previous experience showed that EI’s units were… great prices and even better instruments. Being able to install the gauge as a primary instrument was a major plus.
Nice unit. EI is the best!
The equipment is fantastic, very intuitive, and easy to use.
I have worked with your products before and I like them.
Installed digital volt/amp gauge in PA 28-181. Great unit easy to install. Much better than original.