All Questions
Tagged with measurement sensor
68
questions
0
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1
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105
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How do I calculate the minimum deflection I can sense with a strain gauge, like the BF350-3AA?
I have a strain gauge (the BF350-3AA), and I will be connecting it to an HX711-based amplifier sensor.
From its low-quality datasheet, I've pulled out the following figures:
Nominal Resistance: 350 ...
- 111
1
vote
1
answer
352
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How do I read a load cell just with this data?
I have a load cell (capability = 23 kg or 50 lb.) Its output is 2 mV/V. I have read that that means 2 mV per each excitation volt.
The power connection of this load cell is +15V-GND, so 0.002 * 15 = ...
- 33
1
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1
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226
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Need help with validation of the design of a capacitance sensor array for soil moisture measurement
Product Description
The device is a soil moisture sensing and analysis device that uses capacitance sensing technology to help manage soil moisture in your garden. One probe set at the bottom of the ...
- 109
1
vote
0
answers
50
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Contact measurement
I have a mechanical assembly that is to be mated to another surface. To ensure that my assembly is correctly mounted before installation, I have a test piece I insert into it. When everything is OK ...
- 31
-1
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1
answer
217
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Accuracy Class and Full Scale
I am using this formula to calculate the class of an instrument:
\$\text{Accuracy Class} = \frac{\max{\text{(Absolute Error in Range of Measurement)}}}{\text{Full Scale Value}}\$
The question is, FSV ...
2
votes
1
answer
186
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How to make an accurate strain gauge conditioner
I need to measure tensile strains between 0 and 0.01%, with an accuracy between 1 to 10% within that range.
It seems like all systems that read strain gauges rely on a Wheatstone bridge to amplify ...
- 9,906
0
votes
3
answers
82
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Signals transmission
If I have more than one sensor that provides a digital output (1 or 0 only,) and I only have one pair of wires connected from all the sensors to a specific point (assume the sensors are at point A and ...
2
votes
0
answers
204
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Electrochemical Gas Sensor Potentiostat Circuit
I guess this is more of a review request than a specific question, but I was wondering if anyone has any experience with electrochemical sensors and the required circuits for gaining accurate ...
- 21
2
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3
answers
579
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Resistance bridge for low-resistance sensor
I have a fuel tank sensor that reports the remaining fuel with a resistance between 10 ohms (empty) and 180 ohms (full). I want to read this value using the Analog In of an Arduino (or ADS1115, not a ...
- 692
0
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2
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268
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Is there a way to measure ripples in water with some kind of sensor?
Imagine you have a water tank on the top of a truck (like firefighters have.)Is there a way to measure how much the water ripples with some sensor?
I know sensors that just tell you if there is water ...
0
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2
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104
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Does shunt calibration of a sensor also correct for zero error?
In the datasheet for a load cell (shown below), it says that shunt calibration data is given, also they have mentioned the zero balance. Does the shunt calibration consider zero balance? Meaning, do I ...
0
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1
answer
48
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How wide is IR-led light from VCNL4040?
I have an issue to solve. I'm going to measure an object that looks like this.
My question is if the sensor VCNL4040 have a very wide spread light or very "laser-like" light that ...
- 1,324
13
votes
4
answers
3k
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Why does it take time for electronic scale to measure?
If I am standing on a digital scale or measuring the weight of my luggage,
the display doesn't show the weight immediately - it takes a few fractions of a second.
Why is that and can you overcome it ...
- 147
2
votes
0
answers
303
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Does creep always occur with load cells, or is there an optimum weight capacity?
I want to make a scale which I will place under a wood stove (downdraft gasifier) to measure the amount of wood that goes into the wood stove. The amount of wood which is being measured will be ...
- 21
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41
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Current Sensing IC (MAX9929F) Query
I am using a MAX9929F Current sensing IC and I have a question to someone to may have used it before, or may have some experience with these types of circuits.
The circuit I built around the IC is the ...
