Is MPXV5010GC7U the right product for my design?

[LegacyKeyboardAndRepair]

From the attached picture (20250831_092455.jpg) you can see the MPXV5010GC7U connected with 4mm tubing inserted into a short piece of 6mm tubing which inserted into a 27mm doggie squeaker with the squeaker removed.

The apparatus is filled with boiled water to the level you can see in the picture. This is the second attempt at filling the apparatus. The first was 5 days ago and the level was approximately at the slopping edge of the support beam of the housing.

It was calibrated with the weights shown in the picture. Full scale was approximately 115 analog units. The second picture (PressureData 2025-08-22 180320.png) shows the calibration data (200 grams -> 0 in 5-gram steps). The water level changed less than 1/8’’ over the calibration range.

Today when I fired up the system, the ‘Full scale’ was approximately 29 units. I did not find any evidence of water leakage.

I then attached an 8” piece of 4mm tubing filled with water and used a dropper (1.0 mL) to increase the water level. The reading was approximately 197 units. In the time while I was creating this document (several minutes) the reading has decreased to 195 units.

Is MPXV5010GC7U the right product to use as Gauge?

[JozefKozon]

Dear Lee,

please refer to the Table 6. in the MPX5010-MPXV5010-MPVZ5010 datasheet. The differential pressure range of the MPXV5010GC7U is 0kPa to 10kPa and can withstand differential pressure up to 40kPa.

From your Pressure data it looks you apply pressure from 375kPa to 415kPa. 

If you have applied differential pressure above 40kPa to this sensor, the MPXV5010GC7U is definitely destroyed. Please confirm what pressure you have applied. If you need a Gauge/Differential pressure sensor with higher pressure range, we have pressure sensors with pressure range up to 1000kPa. 

With Best Regards,

Jozef