HOTSYSTEM Universal Electronic Air/Fuel Ratio Monitor Meter Gauge Blue Digital LED 2inches 52mm for Car Vehicle Automotive
Key features
- •Accuracy of analog LED type:Every 0.5%,using BAR type to light up.
- •Display range:Digital type is from 20.0% to 10.0%;Analog LED type is from 20.0% to 10.0%;Both of digital type and analog LED type will show the maximum or the minimum,if the value out off the display range.
- •Warning(Red Light):At start, the voltage is lower than 11.0V,the value of AIR/FUEL is lower than 0.8 or higher than 10BAR(lower than 12 or higher than 120PSI).
- •Direct analog:The digital has 20 LED pcs, 10.0%≤Air/Fuel ratio≤12.5%,the LED lights appear green among 6pcs; 13.0%≤ratio≤17.5%, the LED lights appear yellow among 10pcs;18.0%≤ratio≤19.5%, the LED lights appear red among 4pcs.
- •Easy installation:Our gauge includes electric wire with necessary mounting and installation hardware,no need other sensor, your existing oxygen sensor can fit it well.
BrandHOTSYSTEM
HOTSYSTEM Universal Electronic Air/Fuel Ratio Monitor Meter Gauge Blue Digital LED 2inches 52mm for Car Vehicle Automotive
List Price: $36.84$33.16DEALYou Save: $3.68 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 25, 2026In Stock (1)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.2
out of 5
Based on 10 reviews
5★
70%
4★
30%
3★
0%
2★
0%
1★
0%
Four Stars
Juan Claudio✓ Verified Purchase•October 28, 2023
does what it needs to do for a narrow band.
This is a product.
Michael Bleakley✓ Verified Purchase•October 2, 2023
It is a product. Numbers will show up on the gauge. Not sure what (if anything) they mean but wow!! If you want to look at numbers (usually flashing 10.0) while you're driving, I highly recommend.
works better than expected
fred cabanting jr✓ Verified Purchase•September 30, 2023
Installed it in my ka24e hardbody,works better than expected,almost seems like I'm running a wideband. Pretty close to accurate,spark plugs prove it. If yours ain't working right,you either hooked it up wrong,you have a factory wideband and don't know it,or your o2 is no good. Sometimes you just get a lemon!
DOES WHAT IT SAYS IT DOES
Jose Santiago✓ Verified Purchase•September 15, 2023
If you are lookign for an affordable do-the-job not-accurate way to read your air/fuel ratio, then this is the gauge for you. From my experience as a customer, I just wanna let you know some facts. This is a NARROWBAND gauge. Why? Because it reads only voltage ranging from 0.1 volts to 0.9 volts, which is enough for the gauge to say either your engine is running reach (0.1 to 0.23 volts) or rich (0.6 to 0.9), or what you expect, stoich (good air/fuel ratio, 0.45 volts). The problem however is that not much tuning can be done with these parameters. By the way, that voltage range is produced by the NARROWBAND O2 sensor (It generates voltage ranging from 0.1 to 0.9).
If you would like a more accurate instrument, you want a WIDEBAND gauge and WIDEBAND O2 sensor. Why is it called "WIDE-BAND"? Because the O2 sensor generates a WIDER voltage, typically from 0.1 volts to 5.0 volts. That gives a WIDEBAND gauge a WIDER range to interpret, thus, more accurate.
Back to this gauge, if it didnt bring the instructions like mine, then let me just tell you about the wiring: YELLOW to 12V+. BLACK to 12V- (or engine ground), RED to IGNITION 12V+ (if you plan to set fixed your gauge so it only turns on when the iginition is ON) and GREEN to SIGNAL cable coming from the O2 sensor. By the way, if the O2 sensor is 1-wire or 2 or 3 or 4, just make sure you know which the signal cable from your O2 sensor is.
If you have any other question regarding this setting, feel free to email me at [email protected]
If you would like a more accurate instrument, you want a WIDEBAND gauge and WIDEBAND O2 sensor. Why is it called "WIDE-BAND"? Because the O2 sensor generates a WIDER voltage, typically from 0.1 volts to 5.0 volts. That gives a WIDEBAND gauge a WIDER range to interpret, thus, more accurate.
Back to this gauge, if it didnt bring the instructions like mine, then let me just tell you about the wiring: YELLOW to 12V+. BLACK to 12V- (or engine ground), RED to IGNITION 12V+ (if you plan to set fixed your gauge so it only turns on when the iginition is ON) and GREEN to SIGNAL cable coming from the O2 sensor. By the way, if the O2 sensor is 1-wire or 2 or 3 or 4, just make sure you know which the signal cable from your O2 sensor is.
If you have any other question regarding this setting, feel free to email me at [email protected]
It works!!
Brittney B.✓ Verified Purchase•August 17, 2023
They gauge works very well it's in my car cheap but effective
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