Eyourlife Pressure Transducer, Fuel Pressure Sender with Connector, Sensor for Oil, Fuel, Air, Water, 1/8"NPT Thread Stainless Steel Pressure Transmitter(30PSI)

Update:This unit failed after a week of operation as a water pressure transducer with pressures never exceeding 20 PSI. I cut it open to perform a post-mortem and discovered that there is no barrier between the media being measured and the circuit board (see photos). As a result, you can clearly observe where the water corroded the leads on the IC package and caused it to fail. Cheap junk. If you plan on using it to measure water pressure, don't purchase this item despite its claims.This 30 PSI sensor performs as predicted. The voltage output is very linear, as I have tested it against a known pressure source (see attached graph). I am very pleased with the rugged nature and ease of use. The primary use is to monitor my pool plumbing pressure and I will update this review in the future, based on its performance.

Inexpensive and works. I'm using two of these to monitor fuel and oil pressure in my RX-8. I also have two others (different MFR label but otherwise identical) in my custom-built rotary compression tester. I'm using an arduino and 20x4 LCD display to process and display the data.I hooked them up to a bike tire pump and they were within a few % of the reading on the pump gauge. You probably don't want to use these on systems requiring extreme accuracy but they work well enough for my needs.No idea about longevity in harsh environments yet but I'll report back if they fail.Update: I'm starting to build another Arduino system for use as a rotary engine compression tester. Since I used an Arduino-compatible board with 3.3V logic (Adafruit ItsyBitsy M0) I decided to try running the sensor off of 3.3V instead of 5V. It works perfectly. So, you can run this on systems with 3.3V logic without having to use a voltage divider.

Terrible product, failed within days of being installed, was being used as a degassing bottle pressure sensor, worked goood at first, then randomly then not at all. By better made transducers.

If I could do zero stars i would :-).Failed after 12 hours usageGot the unit yesterday for a Arduino project I am working - monitoring water flow and pressure. Unit worked fine last night after I installed it - reading 72psi +/- 2 psi (yes it is noisy - but I can filter sufficiently in F/W). This morning - it was reading 45psi +/-5psi - got my mechanical sprinkler pressure gauge out and had my normal 70 psi and no fluctuations. Odd said I - but thought maybe I had a loose connection or such - but nothing manifested. So went with it planning to re-calibrate it later. Well 4 hours later it is showing 112psi (5v). It is jammed solid at that value - no amount of playing - re-powering - or such recovered it. In short - it was dead. Or is that dead-short to +5 - Haha.Anyway - a large disappointment. And from the reviews - this does seems to be a common failure. Given it was running off the Arduino 5v regulator and all the other items are happy - I must assume that it has just failed and is obviously a poor quality/design.

This pressure transducer was a super find for the price. I was able to calibrate the transducer to within 5% of a known good gauge. This was a one time use so I can not say how long it will perform well. I had to measure the fuel pressure on my car while driving. It was flawless in operation with a sample rate of about 40 samples per second. The housing is sturdy and the threads provided a leak proof seal which is important to keep gas from spraying on the engine. When using the transducer, you must use a well regulated 5V supply. A shift in supply voltage will result in a shift in the output. I've used expensive transducers at work but am quite impressed by the function of this transducer at a rock bottom price. This transducer is ideal to be used with an Arduino micro controller or similar product. I give it 5 stars on performance, ease of use, finish quality, and cost.

Updated a few days after usage began:Sensor failed, and now reports erroneous readings, generally notably negative pressure in open air. Sensor was connected to tap water at about 10PSI.Junk. Do not buy.------------Performs exactly as expected.When powered at 5.00V (red), output (yel) was 0.513V at ambient pressure of 29.85inHg. Output is ratiometric with supply voltage. Current consumption was 2.07mA. Note that this sensor responds to absolute, not relative pressure, so barometric pressure changes will affect it when in open air.If you're an Arduino user, you'll get excellent results powering this from AREF yielding a resolution of 30 PSI / (0.8 x 1024) --> 0.037PSI.Supplied cable comes with short lengths of wire -- my photos show extensions added for Arduino usage. Note the shrink-wrap also over the outside jacket as that cable has an exposed shield layer.Included image shows extra fittings added for connection to 1/8" irrigation tubing. Sensor has 1/8" male NPT fitting.Aurduino code follows:/*--------------------------------------------------------------*//* Water pressure sensor. Ranges 0.5-4.5V for 0-30PSI. *//*--------------------------------------------------------------*/int water_pressure_ticks;int water_pressure_10mPSI; // pressure in 0.01 PSI units#define PSI_0_MV 500 // millivolts at 0.0 PSI#define PSI_30_MV 4500 // millivolts at 30.0 PSI#define ADC_RANGE 1024 // range of ADC#define ADC_MV 5000 // range of ADC in millivolts#define PSI_0_TICKS (int)((float)PSI_0_MV /ADC_MV * ADC_RANGE)#define PSI_30_TICKS (int)((float)PSI_30_MV/ADC_MV * ADC_RANGE)#define PSI_RANGE_TICKS (PSI_30_TICKS - PSI_0_TICKS)#define PSI_RANGE 3000 // 0.01 PSI unitsvoid PressureRead(void){ int ticks; water_pressure_ticks = analogRead(PRESSURE_SENSOR_PORT); ticks = (water_pressure_ticks - PSI_0_TICKS); // 0 PSI offset water_pressure_10mPSI = (int)(((long)ticks * PSI_RANGE + PSI_RANGE_TICKS/2) / PSI_RANGE_TICKS);}