Questions tagged [pressure]

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19 views

Pressure to current conversion

I was trying to convert the pressure values (in psi) into 4-20mA current. The range of pressure values I have chosen is between 0-10Psi. But according to the link given below the pressure from 3-15Psi ...
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2answers
107 views

How to detect when the lid of a box is loosened (as soon as the screws are unscrewed)?

I have an aluminium box (dimension about 10 × 10 × 10 cm) with a lid closed with 4 screws (such as this: https://www.hammfg.com/electronics/small-case/diecast/1590). I would like to put a simple ...
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1answer
50 views

Sensors - How to convert 4-20mA output to temperature and pressure values?

I'm dealing for the first time with two sensors, of pressure and temperature. Both have output of 4-20mA, then I'm using a 47 ohms 1% to convert to voltage. When flows 20mA, 20mA * 47 ohms = 940mV, ...
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48 views

Help identifying pneumatically activated switch with possible BMS

Some decent googling has yielded me no results. Attached are pictures of a component that allows power from a 3-5v power supply to flow when positive pressure is applied to one side or negative ...
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1answer
27 views

Hydraulic pressure sensor for biological sample

I need to filtrate blood sample (About 2 ml). I have a tube (roughly 0,5 inches of internal diameter) attached to the filter cassette inlet. The cassette is plugged to vacuum pump. I would like to ...
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1answer
101 views

Why shows the effect shown in the video below left-right asymmetry?

I made this video which shows what happens when I move the point of a wooden chopstick over my TFT-LCD screen, with firm pressure. It's remarkable that one can see that there is a difference between ...
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1answer
20 views

Sensor Connection: DIN 43650 vs M12

Preface, I'm a plant engineer and my background is mechanical engineering. My current project requires me to find some pressure sensors for my compressed air lines and this is a pretty new territory ...
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25 views

How do you model acoustic waves underwater that are generated by an Nd:YAG laser?

In this paper on page 84 they show the following experimental setup: The array of receiver hydrophones are set up to record sound pressure waves sent by the transmitter hydrophones. In Figure 6....
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1answer
49 views

How to read the following datasheet of a sensor?

I wanted to write about static and dynamic characteristics of the Honeywell pressure 19mm transducer. I found my sensors datasheet but could not find the following characteristics mentioned in the ...
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2answers
125 views

Pressure sensor for COVID19 medical equipment [closed]

Ventilators are going to be in critical shortage worldwide soon because of COVID19. Many people are working on jury-rigged solutions. A lot of those solutions work (most of the time!) but they have ...
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1answer
88 views

Need help interfacing an ADC with a pressure transducer

I am trying to connect a pressure transducer which gives a 4- 20mA current output to an ADC which I believe can only take voltage inputs. How will I be able to read a current output from the ADC? Do I ...
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1answer
34 views

Need advice choosing wiring configuration for combination pressure and temperature sensor

I am currently trying to purchase a combination temperature and pressure transmitter for a project, and it has an option to choose between a 3 wire or a 4 wire configuration. I have attached the link ...
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1answer
51 views

How increase pressure sensor breadboard sensitivity?

I build a pressure sensor breadboard according the schematic. It works, but has quite low sensitivity - it shows some pressure only after big pressure is applied. Is there a way to increase ...
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135 views

What type of sensor connection would be the most suitable?

I have a pressure transducer with a 6 pin bayonet MIL-C-26482 male connector. I need to wire this connector with a 9 pin female D sub analog input connector and I am not sure how to do so. Schematic ...
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1answer
61 views

Manufacturable technology for force-sensitive button

I'm hoping to hear your perspectives on which force-sensing technologies would be most reliably and inexpensively manufactured at volume. The application is a pressure-sensitive button, as are found ...
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1answer
47 views

Voltage or Current Control with a Microcontroller for Pressure Regulator

I am wanting to control the flow rate of a pressure regulator (https://www.festo.com/net/SupportPortal/Files/505126/VEAB_2018-05a_8080669g1.pdf). My idea is to control this with a PWM signal 0-5v. ...
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2answers
60 views

Mechanical pressure contact

What I'm looking for is to be able to solder a mechanical pressure plate/arm to a PCB, where a plastic tab can be inserted. This contact (when connected) will complete the 3.3V/5V supply and turn on ...
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1answer
83 views

Questions about capacitive sensing

I'm trying to use the FDC1004 capacitance-to-digital and I have a few questions: Why do we (our fingers or another part of our body) act as the other conductive plate - don't we have a very large ...
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1answer
58 views

mpx5010 drifting

I have a MPX5010 pressure sensor that outputs a voltage proportional to applied pressure. Output is connected to an amp-op with gain=4 so my output is around 1V when no pressure is applied. That ...
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2answers
72 views

What type of pressure or weight sensors are thin? (Arduino or R-Pi) [closed]

I want to know if a person is in a walking path of approx. 10x1,5 meters. I thought on putting thin tables in the path and putting these sensors under each even table (to save some money): https://...
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1answer
43 views

Pressure sensor for a 3d object for an arduino prototype [closed]

I am not an electrical engineer but an industrial designer, and I work for a SexTech company that strives to create sophisticated sex toys for women. We are currently trying to prototype a vibrator ...
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1answer
119 views

Understanding the MPX2053 Pressure sensor

So I am a bit confused as to how I would operate a pressure sensor whose pressure range is between 0-50 kPa because the moment I remove it from the packaging and expose it to the environment, it will ...
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1answer
86 views

Detecting a feather touch [closed]

New to the forum here, but I have a need to detect a feather touch. Is there any sensor that is recommended? This will be in a vibrating environment, so audio is probably out of the question. Is a ...
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2answers
87 views

LED light bulbs in low atmospheric pressure

I have these (https://www.amazon.co.uk/gp/product/B01DBOKZVK/ref=oh_aui_detailpage_o09_s00?ie=UTF8&psc=1) LED lightbulbs. Can I use them in a pressure of ~30kPa (21" Hg vacuum)?
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1answer
152 views

Problem with Vout of Honeywell ASDX Analog pressure sensor

Few months ago I decide to bought an absolute pressure measure system using a Honeywell ASDX differential analog pressure sensor (Model: ASDX ACX 030PAAA5). The datasheet of this type of sensor ...
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1answer
98 views

Non-inverting op amps with sensors [closed]

I would like to know if there's a negative implication of using non-inverting op amps with sensors, for example a pressure sensor? Would it be a better option to use an inverter, and if it is, why?
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1answer
186 views

Pressure transducer being read using Labview

I understand this is not a typical question for this forum, and that NI Labview forum would be better (I posted there too), but I am hoping that someone who is proficient in Labview will see this. I ...
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2answers
36 views

Question about pressurization and introducing air into a small chamber

This is probably very easy to answer, but I'm working on a project where I need to heat a chamber (insulated Styrofoam container), and my option to heat it is essentially a hair dryer, as a heat gun ...
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2answers
66 views

Suggestions on conductive materials for textile capacitive pressure sensors

I am doing preliminary research for my thesis. The thesis involves textile capacitive pressure sensors. I am trying to find out more about how the type of conductive material used affects the ...
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1answer
222 views

How to measure internal battery pressure?

Which unit is used to measure internal battery pressure? And how can it be measured? (Does it change with battery age somehow?) The internal battery pressure increases at high charging capacities and ...
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1answer
333 views

Reading values from Force Sensitive Resistor - Arduino

I am trying to read the values from a Force Sensitive Resistor with Arduino. Actually, I am already reading them, but it only works if I use a 10 Ohm or lower resistor and it really heats up. (See ...
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2answers
233 views

Is the HP206C really so precise?

I'm looking for barometer sensors for use in Arduino projects. One of the items I consider is the HP206C (at Reichelt, Germany). The vendor contradicts himself a little bit when he mentions 0.1 m and ...
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1answer
104 views

Help me identify a sensor I got from a PCB

I am currently working on a blood pressure monitoring system(for a class) and I was handed an old, non working wrist blood pressure monitor to salvage any components I could. So I tore it down, took ...
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2answers
274 views

Pressure/Voltage analogy [closed]

Imagine a hydrocarbon being pumped through a flow line Now imagine if a valve downstream of the pumps was shut and then you were pumping against pressure ! Ok, this will cos a rupture of your ...
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2answers
75 views

Pressure of an electric contact and resistance

Ok guys, my question is simple, how does the pressure of an electric contact influence the resistance of the human skin?
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1answer
68 views

How is a 'ribbon controller' called in electrical terms?

On some synthesizers, there is a strip called ribbon controller, to wipe your finger over and it detects pressure. It's a bit similar to a mobile phone's LCD touch panel, except that it is one-...
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40 views

Successor of VTI's SCP1000 Family of Absolute Pressure Sensors

VTI's SCP1000 product family is a range of ceramic capacitive pressure sensors that have reached the end of their lifespan. It has been suggested that certain sensors designed by others (like Bosch ...
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2answers
261 views

No Acknowledgement from slave device

I am using a FTDI's UM232H usb-i2c adapter to communicate with MAX6615 temperature monitor device and DLVR pressure sensor. I developed a I2C routine to talk to these above mentioned devices. I can ...
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3answers
887 views

Measure the pressure on a push button

I am looking for a way to measure the pressure on a push button when it is pressed. I intend to save it in flash of a microcontroller. Please let me know if you know any device which could be useful. ...
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3answers
1k views

Measuring negative pressure with a raspberry pi and I2C Pressure Sensor

I want to measure negative pressure which is generated by a diaphragm / membrane pump with 0,5 Bar (according specification). I am not sure if such a sensor as this https://sensing.honeywell.com/...
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1answer
216 views

PCB material that does not swell from water absorption?

We designed a microchip to sense high pressures under water. The chip senses pressure through a thin diaphragm that deflects and a corresponding piezoresistor circuit that measures the deflection. For ...
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61 views

Sit counter or pressure counter?

We have to count how many times a particular chair/seat has been "sat upon" - how would one go about this? Brute force approach suggests put together a pressure sensor to flip a digital counter. ...
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1answer
131 views

Detect if bud earphones are in ear

I have bud earphones, through which I am listening to music. Air pressure in my ear (after inserting the earphones) is presumably slightly higher than the pressure of the surrounding air outside of my ...
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6answers
1k views

Waterproof and pressure sensor

I'm designing an equipment that will be in a rural area exposed to heavy rains. I already got an IP67 rated enclosure with IP67 connectors and it's working as expected. I need to measure the ambient ...
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184 views

Pressure Transducer to complete circuit

I'm using the Adafruit Feather nRF52 to build the HIDScan sketch which essentially allows completed circuits to transmit keys over bluetooth. I have a switch that connects from pin A0 to GND, and ...
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2answers
544 views

two or more SDP610 Pressure sensor Interface with Arduino uno using I2C

I have interfaced one SDP610 Pressure Sensor using I2C with Arduino Uno R3. Now I want to Interface more than one sensor with same controller(uno board). I don't find any higher or lower address in my ...
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1answer
436 views

Honeywell Pressure Sensor TSCDANN150PGUCV, Amplifier circuit?

I have been trying to find amplifier circuits for this sensor. The datasheet has one on page 29 (pic attached). However as seen in the pic, the values for the resistors are not specified and we can't ...
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1answer
80 views

Force sensor on uneven shape

I'd like to measure the force that a human leg impacts on a knee brace during normal gait. I have a problem in finding a suitable sensor for the job... The leg (and hence the brace) are not flat at ...
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1answer
66 views

What are the range of pressure values we receive from an ultrasonic sensor?

While trying to receive ultrasonic waves from a Sonar using a pressure transducer what are the range of values of pressure I can get. I need these values to buy necessary equipment for doing the ...
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1answer
132 views

Will reed switches break in various weather conditions

I will be using an OKI ORD-9216 14mm reed switch in my mailbox, which is outside of my house. Below is a picture of a reed switch. I am worried to whether the reed switch's glass will crack due to ...