Are these pressure transducers available in any other pressure ranges? I bought two of these for my pool and stupidly forgot to check the pressure range. The pool only operates at ...
JaneYu 2018-08-15 01:15:28 7 Views57 Replies Are these pressure transducers available in any other pressure ranges? I bought two of these for my pool and stupidly forgot to check the pressure range. The pool only operates at about 200Kpa but the sensor shown is rated at 2Mpa so I'll only be able to use about 10% of the full scale reading. I can use them, but I'd obviously get better resolution from an appropriately rated transducer.
So, are any other pressure ranges available?
What is the body of this material? is it regular steel or stainless steel, if stainless what grade?
JaneYu do i need a to have a regulated 5v?if not how high can i power for the pressure trandsducer?
and also is this transducer more robust than other transducer from other supplier( those 1/8 npt transducer)?
is it weather proof?
JaneYu do you have that can handle corrosive water? (brackish water)
JaneYu You could take a look at this product:
https://www.dfrobot.com/pro...
This is the stainless steel, with anti-corrosion treatment.
Hi,
I am using the sensor for a project at university, would you guys happen to have a 3D CAD model of the sensor. That would be really helpful.
Thank you.
JaneYu Hello i use this sensor for measuring pressure in CH system, Just behind (at output of) the water tank heated by cascade of two gas boilers. I wanted do detect low pressure caused by automatic pipe bleeding but i experience large fluctutions in readings, related to current water temperature eg. Having 50*C the pressure is 0.175 MPa, having 68*C the pressure measured is 0.228MPa. I've measured output voltage from sensor and it changes accordingly. Why does the measured pressure raises while on classic pressure guage (installed nearby) this doesnt happen? (At least in this extent) thanks for help in advance
JaneYu Hi, You can add a resistor to the sensor output to scale down the output voltage.
JaneYu Hi, You can add an AD module to the Raspberry Pi to get the analog value of the sensor.
JaneYu hello, i will be using this product in order to monitor the water pressure inside of a tank, my question is will it also be able to measure the pressure of an oxygen tank? thanks.
JaneYu Hi, This sensor cannot detect gas pressure
Hello
"Medium: liquid/gas without corrosion" is written but I want to be sure before buying. Is it possible to measure the pressure of a non corrosive gas at around 1 MPa?
JaneYu Hi, I've purcahsed two of these sensors. I've calibrated, and both (with different pressures) are reading waaaaay too high.I had to change the code to P = (V-offset) *245 in order to get correct readings. I noticed another poster with the same level or inaccuracies (apply this calculation also fixed his readings), is there a batch of these that need different multipliers? It's like the range is actually 1000kpa not 1600
JaneYu Hello, I have purchased 2 sensors SEN0257 to monitor domestic water pressures in my house (before/after water pressure reducer). From my analogic water pressure sensors, the pressure before the reducer is equals to 8,75 bar (875 kPa) and the pressure after the reducer is equals to 3,4 bar (340 kPa).
But the output voltage of the first SEN0257 is measured by my voltmeter to 4,19 Volts and second SEN0257 is measured to 1,88 Volts. From the calculation in your wiki (P = (V - OffSet) * 400), the pressures (with 0,49 V for the offsets) would be equals respectively to 1480 kPa and 556 kPa !
What is wrong ?
JaneYu I have the same issue, I had to change the multiplier from 400 to 245 to obtain accurate readings. I did the calculations and that would also fix your readings. I have two sensors, one at 660kpa and another at 260kpa, and I've physical pressure gauges on both to confirm the real readings.
So it seems there's either an error in the specs, or there's a whole batch of these with a different range, as it's seems very unlikely our combined 4 sensors are all defective to exactly the same degree.
A range of 0-1000kpa would be fine for me, so hoping DFRobot come back to confirm that this is the case for the latest batch, otherwise I'll need to return them
Hi Phil,
Here's the technical specification about this product.
https://uploads.disquscdn.c...
That's all we have, if you have any questions about the datasheet, please contact us through [email protected]
JaneYu Hi, I want to measure mains water pressure. I'm considering using this sensor with an external ADC such as the MCP3208 which is 5V tolerant but have a precision reference of 2.0V. As the output range is 0.5-4.5V that is 1600 / (4.5 - 0.5)= 400 Kpa/volt giving me a range of 0-600 Kpa range (roughly 87 PSI) (400 X (2.0-0.5)) which is a much better range for mains water and giving me a better resolution with a 12 bit ADC.
Does anyone see any problems with this proposal?
JaneYu Hi,
I think you can just try to test it.Since it is the output voltage signal, I think there is no problem.
Hello, is there any sample code or project video about this sensor? I got confused because I don't have things to calibrate this sensor.
JaneYu Maybe you can refer to this link:
https://wiki.dfrobot.com/Gr...
I know this product is not discontinued but the link which you gave me is discontinued.
JaneYu My mistake, here is a sensor with a barometer built in: https://www.dfrobot.com/pro...
Is it possible to measure the water pressure of the bottom of a river? I want to use this as a means to measure the water level of the river. The river's depth ranges from 3-10m.
JaneYu Hi,
This sensor normally is installed on the pipe or a tube. I don't think it can measure the water pressure directly.
Just the top of the water. It's not accurate enough to meet your requirement. The accuracy of this sensor is around +/-16Kpa.
JaneYu 
