What is the outer diameter of the threaded part, and will this sensor work with water?

Yes, it will work with water. I believe the outer diameter is 1/4" male NPT thread. That said, you can always use a bushing to adapt it to whatever you are screwing it into (e.g. make it work with a 3/8" NPT female fitting).

I want to use this for a lab experimental procedure: will I be able to retrieve the pressure data in real time?

That depends on what you mean by "real time." It outputs an analog voltage that is a linear slope ranging from 0.5 volts (or close to that) for 0 Psi up to 4.5 volts (or close to that) for the upper range of Psi per sensor (150 Psi for the one I purchased). I assume there is some minimal latency for the analog circuitry inside the sensor to convert mechanical energy to electrical energy, but on your end, as I'm doing, you'll need to use an ADC (analog to digital converter) to process the data digitally, which has its own set of latencies depending on processing speed, bit resolution, etc. For my purposes, it's close enough to real time since I'm using an arduino board with my main loop time of less than 20 milliseconds with several of these sensors, and other sensors.

How come my gauge is 20 psi off

Here is the speciafication for our item : Output: 0.5V–4.5V linear voltage output. 0 psi outputs 0.5V, 100 psi outputs 2.5V, 200 psi outputs 4.5V

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AUTEX 150 Psi Pressure Transducer/Sender/Sensor 150/200 Psi Stainless Steel 1/8ââ‚¬Â-27 NPT Pressure Transducer Sensor Compatible With Oil, Fuel, Air, Water

AUTEX 150 Psi Pressure Transducer/Sender/Sensor 150/200 Psi Stainless Steel 1/8ââ‚¬Â-27 NPT Pressure Transducer Sensor Compatible With Oil, Fuel, Air, Water

Product ID: 444760541

Details

Brand
AUTEX
Material
Stainless
Style
Modern
Maximum Supply Voltage
5 Volts (DC)
Measurement Accuracy
±1.5 psi

📈±1%FS High Accuracy

⏱️1ms Ultra-Fast Response

⚙️316L Stainless Steel Durability

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Description

⚡ Pressure Perfected: Precision Meets Power in Every Pulse

WIDE COMPATIBILITY RANGE - Seamlessly measures oil, fuel, air, and water pressures up to 150 psi—versatility that fits every industrial need.
PRECISION LINEAR VOLTAGE OUTPUT - 0.5V to 4.5V output ensures smooth integration with your control systems and flawless data accuracy.
INDUSTRIAL GRADE STAINLESS STEEL - Crafted from premium 316L stainless steel for unmatched corrosion resistance and longevity in harsh environments.
LIGHTNING FAST 1 MS RESPONSE TIME - Instantaneous pressure readings keep your systems ahead of the curve with real-time precision.
BUILT TO ENDURE EXTREME CONDITIONS - Operates reliably from -40°C to 125°C with shock resistance and electromagnetic compatibility for uninterrupted performance.

The AUTEX 150 Psi Pressure Transducer is a high-precision sensor engineered with robust 316L stainless steel and advanced auto-graded plastics. Delivering a rapid 1ms response and ±1% full-scale accuracy, it provides reliable linear voltage output (0.5V–4.5V) compatible with oil, fuel, air, and water pressure monitoring up to 150 psi. Designed for industrial-grade durability, it withstands extreme temperatures (-40°C to 125°C), shock, and electromagnetic interference, making it the go-to upgrade for professionals demanding accuracy and resilience.

Specifications

ASIN	B00NIK98O8
Best Sellers Rank	#268,212 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #158 in Pressure Probes & Sensors
Brand	AUTEX
Brand Name	AUTEX
Customer Reviews	4.2 out of 5 stars 252 Reviews
Manufacturer	AUTEX
Material	Stainless Steel
Material Type	Stainless Steel
Maximum Supply Voltage	5 Volts (DC)
Measurement Accuracy	±1.5 psi
Model Number	GSND-0556629788
Mounting Type	Flange Mount
Output Type	electrical signal
Response Time	1 Milliseconds
Specific Uses For Product	Industrial
Style	Industrial
Style Name	Industrial
UPC	702373916802
Upper Temperature Rating	125 Degrees Celsius

Reviews

H**N

Will purchase more

16.06.2025

D**M

Works as a replacement for AEM

29.09.2024

J**E

Perfect replacement for the AEM sensor for their oil pressure gauge

30.10.2025

N**U

Defective sensor output

17.04.2025

C**S

Great For Oil Pressure Sensor

17.11.2023

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