Questions tagged [gas]
The gas tag has no summary.
32 questions
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MQ6 first time use with ESP32
I am using a MQ6 gas sensor and ESP32 dev board. The intent of this circuit is to have gas sensor sense the gas leakage and inform ESP32 to take further action.
Following is how, I am connecting the ...
- 21
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191
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Paschen's law - pd value
According to the below curves graph and what is written in Wikipedia the minimal arc voltage for argon gas is 137V at 12μm. The pd (p=pressure in pascals & d=distance in meters) equals to m·atm, ...
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What procedure causes the bimetallic strip to heated up on a Glow Switch Starter
As I know the current flows momentary through the starter only when the bimetallic strip has bended and touched the other pin of the starter. As I understand when the 230V is applied between the ...
- 921
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3 pin Gas Discharge Tube (GDT) - pinout order
I would like to know the reason behind the pinout order of a 3 pin GDT.
GDTs are designed to prevent damage from transient disturbances by acting as a “crowbar” in creating a short-to-ground circuit ...
- 141
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463
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Spark gap breakdown voltage vs gap area
I've been trying to design a 1 MV hydrogen gas spark gap.
I found the resistance of such to be in the range of 7 Ω/cm, not suitable for a target 40 kA current. Can I make the spark gap shorter without ...
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How to control gas discharge rate? [closed]
I need to electronically control discharge of very small air volume over a reasonably large period. Something like discharging 33ml over 15 seconds. I have tried a needle prick hole but it discharges ...
- 127
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173
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How can I read a thermocouple situation with an ESP32
The thermocouple has two pins (a ground, a 0 to -0.0004 when activate the bobbin to run the gas.) I want know how can I detect whether the gas is open or not without adding a sensor to the system. ...
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161
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Reactive power fluctuation
We have 6 Caterpillar gas generators 3520c.
One of them when synches with the grid. Its kVAR fluctuates over wide range and the aux voltage too and the excitation volt and current. We checked AVR and ...
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275
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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
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Can anyone identify this component? B08 55L
This is on a gas solenoid control circuit. Glorified on and off switch, the only significant other bit in the circuit is a NAND switch dual Schmidt trigger IC.
The right leg is connected to ground, ...
- 57
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How to calculate the pressure and velocity of an ionised gas that is being impelled with magnetic pressure
Calculating the velocity and pressure of an ionised gas based on magnetic pressure and magnetic force.
Questions:
Based on magnetic pressure expressed on an ionised gas, how do I calculate the ...
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(cantilever) gas sensor with MOS technology - How does it work?
I'm having trouble understanding how the gas sensor with MOS technology works. I cannot find a study material with the basic principles of operation. I can find some subjects, but with information ...
- 509
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2
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116
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Gas discharge tube load type
I can not find any information about the type of load of neon lamps, for example neon probe or wall contact plug or extension cord with switch with small red lamp. I think this is a passive capacitive ...
- 126
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138
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H2S Sensor with 1 PPB Lower Detection Limit
We're trying to create an IoT device that can detect/mesaure H2S in ambient air with a
lower detection limit of 1 ppb or 0.001 ppm
However, checking Digikey and other similar suppliers, I haven't ...
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Surface oxidation rates in CO2 vs Nitrogen vs Air?
Is there a difference in surface oxidation and formation of electrical arcs on electrical contacts in ambient CO2 and N2 and Air? Can the surface oxidation difference be quantified?
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