• SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
  • SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
  • SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
  • SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
  • SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)

SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)

SKU:HA4U8TOE6
Sale price
SG$ 50.40
Regular price
SG$ 84.00
Unit price
per 
( 40% off )
Quantity:
Expected Delivery: 21-28 days

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10 Days Return

  • Using IO trigger for at least 10us high level signal
  • The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back
  • IF the signal back, through high level ,time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time velocity of sound (340M/S) /2
  • Power supply :5V DC, quiescent current : <2mA,effectualangle: <15 ranging distance : 2cm~500 cm resolution : 0.3 cm

Customer Reviews

Works great with ArduinoI have an Arduino Uno and I got this ranging detector as yet another device with which to experiment. I noticed these ranging detectors are common for many robotic designs and the price was very reasonable so I ordered this one. It fit easily into my breadboard and worked well with my Uno. I was able to find some open-source programs that work with this specific detector. If you find yourself looking for such programs online, be sure to get programs for the SR04. A different ranging detector has only 3 pins and the associated programs work very differently from this 4-pin detector. So far I've just been toying with the different distances with a live feed of the raw (distance) data on my computer. It's a good introduction to this type of device, especially if you intend to implement it into a robotics project. 5Great Sensor! These don't get hung when there's no ECHO heard like others do.These are fantastic little sensors. I had a bit of a hard time getting started with them, but once I got things going they're very reliable and accurate.In order to use them, you'll need to set the TRIG pin high for a bit, then listen to the ECHO pin and see how long it's "HIGH". Based on the amount of time it remains high, you can do a bit of math and figure out the distance.I ran into some of these a while ago that only had 3 pins on them, and they tended to become unresponsive if they didn't hear an echo back. I didn't run into that problem with these. They're great.I did a detailed write-up of how to use them, including schematics and code here:[...] 5More fun than a belfry of bats!This thing is so much fun! It is very accurate and I was able to get it to sense things out to about 16 feet. I used it for two different halloween props this year. Since it is actively pinging and returning distance readings (as instructed by your Arduino code), you can trigger different things to happen as your victim approaches. One thing at 15 feet, another at 10 a third at 5, etc. The other prop was designed to drop a spider on a persons head when they got to a particular spot exactly. exactly! It worked perfectly every time. The only thing I found a little troublesome but easy to fix, was that you can't shoot this sensor straight down like you can a PIR sensor. The ping needs to bounce off something large enough to reflect the ping back to the sensor. Heads and shoulders do not seem to consistently be big enough to do that. So...PIR for very general motion sensing. This thing for accurate distance measuring.There are several places on-line where you can find instructions and code for this four pin sensor. The Paralax sensor only has three pins, but all of the code can be used for this one whith one little tweak.I'm very happy with this sensor and will probably buy many more next year! 5Bad for my projectIt doesn't work well on my project. I actually want to give one star but it gives right value when it responds. I needed a distance sensor to check if there is something passes by within particular range. I tested a lot with all sensors I received today and also PING))) sensor I already have. PING))) sensor returns a value every time I pass by the sensor but this HC-SR04 sensor returns a value SOMETIMES. Not sensitive sensor at all and it's bad for my project. I don't care if it returns accuracy value or not. I just wish it returns a value all the time when it needs. I'm curious if other customers don't have this problem. Just go with PING))) if you want a distance sensor which works all the time when you need. I wasted my money. 2Solid, inexpensive, and delivered quicklyNow this is a nice and solid piece of hardware. The unit sits flush against the breadboard, has mounting holes pre-drilled, and is overall a very nicely-done package. This is a fun little module. There is more to it than simply reading a switch or sending out a digital High/Low voltage. Buy a couple of these, get a motor shield, tack together a maze, and create a robot that follows one wall until it breaks free, or just let it patrol the room perimeter. Good for a few feet of accurate measurement, so it's great for lots of projects.Both pieces I purchased through this seller have functioned perfectly, and I would gladly choose to buy through them again if given the opportunity. 5I use it for my robotPlease, check its action on my robot: "Arduino-based light sensing and obstacle avoiding autonomous robot." on YoutubeDownside of this sensor: it occupies 2 pins on Arduino (trigger of the signal and sensor of the echo). Voltage and ground I do not count. More expensive model has only one pin - it triggers and receives the signal (plus voltage and ground pins, of course).Upsides: very cheap!, super precise!!! I measured with the tape distance it sends to computer - very accurate, almost to millimeters. The maximum distance is 6 meters. One cm further will show still 6 m. One cm closer will show 5m 99cm. So, it feels that 6m limit is not physical, but technical limit, it just "does not want" to measure anything beyond 6m. That is fine for my robot project.Downsides of this type of sensors in general: 1) it sends very narrow beam, so the obstacle a little on the side from the beam would not be seen; 2) soft fabric or wool absorbs the beam and sensor does not see the obstacle. For example, if you point it at the center of your chest and you have a sweater, than sensor would not see you and show 6m distance. That is why my robot needed not only ultrasonic sensor, but also "stupid" touch sensor. 5Accurate, but only at short distancesI'm an engineering student who needed a sensor for obstacle avoidance in an autonomous boat competition. This sensor is cheap and works, but the advertised range of 3 meters is not achievable. Beyond 1 meter, the readings are completely unusable, and even at closer distances, I had to take the median of 5 pulses to filter out all of zeros that it would return between valid measurements.For most hobbyists experimenting with programming and small scale robotics, this would probably fit the bill, but my boat traveled at high speed and 1 meter didn't give enough time to react, so an alternative had to be devised. At $6 though, its cheap, and worth experimenting with if your building something where the range limitation isn't an issue. 3better code would fix that upI don't have a project for this yet, but I did test it. Being the only one of these I have ever used, I can't compare it to other companies. I can tell you it works, both with Leonardo and mega, and is very accurate in measuring distances. Up to 30' is how far I went, down to 3 inches. it does get a little confused under 10 inches, but I'm sure, better code would fix that up. I did not use much math in my code, and I think timing delays would solve the close proximity confusion. IE (under a foot it reads all over the place 1 inch to 10' etc) I try to be as honest and accurate as I can. I use comments like this to make buying decisions. If you see a bad review from me and buy anyway you will kick yourself. If you do one please use more words than "good deal" or "great" It helps us all. Overall I find this well built, great price and I plane on getting more of the same before price goes up. 5Worked very well!Bought two of these. They easily hook into the Arduino. Sketch/code is out there to easily program it. I had my $8 remote control Walmart car ripped apart, combined with $15 Arduino, $12 motor shield, and this in less than an hour. Then programmed it to detect obstacles 2 feet away (does 4 inch, maybe less, to 20 feet/size-of-medium room or more), backup turning left, and go forward trying again. Car was bad, so it only did a 15 degree turn or so. But enough times it would go around most obstacles in my room. It did not detect small rods or tubes. But for nearly everything else it worked great. Getting a Gyroscope module to detect when it is stuck (how it shakes stuck vs const velocity should give me what I need). 5Accurately Measures Distance to WaterI'm using it with a Raspberry Pi 3 and it works great so far. I'm using it to track the water level in a plastic bin (17 gallon Home Depot) and it is really accurate. When the bin is empty, it detects 32.4 cm from sensor to bottom of bin, when full, it detects around 5 cm which is exactly right if I measure it with a tape measure. If you are measuring water and using another system to fill the water, make sure you let the water settle before pinging for the distance. The setup in the photo here is not yet complete. Ultimately this will supply a rain gutter grow system and a pump will fill the bin. The ping sensor will be used to let the pump know when to turn off and on based on depth reading. 5
See All Reviews
Shipment tracking ID will be provided after your product(s) is dispatched. The delivery date stated is indicative and subject to availability, payment authorization, verification, and processing. In case your product(s) is not delivered due to an incorrect or invalid address, we will not be able to process any claims. However, we will notify you if it is returned to us.
  • Return or exchange requests can be made within 10 days of the delivery date.
  • To return or exchange any items, please email us at info@directnine.sg, clearly mentioning your order number and our customer support team will guide you on the process.
  • To be eligible for return, products must be in the exact condition you received them in. All packaging material must be undamaged and unused with the price tags intact.
  • Orders can be cancelled before dispatch. If the order has already been dispatched, cancellation fees might be charged.
  • Due to the nature of the products that we sell, we will not be able to replace or refund unwanted items if they have been opened or any seals are broken.
  • The refund will not include the import duties or the cost of delivery or return postage.
  • If your refund is approved, then it will automatically be credited to the original method of payment, within 7-10 days.
  • DirectNine reserves the right to alter and enforce this Return and Refund Policy at any time without having to serve a prior notice to users.
Description
  • Using IO trigger for at least 10us high level signal
  • The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back
  • IF the signal back, through high level ,time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time velocity of sound (340M/S) /2
  • Power supply :5V DC, quiescent current : <2mA,effectualangle: <15 ranging distance : 2cm~500 cm resolution : 0.3 cm
Reviews

Customer Reviews

Works great with ArduinoI have an Arduino Uno and I got this ranging detector as yet another device with which to experiment. I noticed these ranging detectors are common for many robotic designs and the price was very reasonable so I ordered this one. It fit easily into my breadboard and worked well with my Uno. I was able to find some open-source programs that work with this specific detector. If you find yourself looking for such programs online, be sure to get programs for the SR04. A different ranging detector has only 3 pins and the associated programs work very differently from this 4-pin detector. So far I've just been toying with the different distances with a live feed of the raw (distance) data on my computer. It's a good introduction to this type of device, especially if you intend to implement it into a robotics project. 5Great Sensor! These don't get hung when there's no ECHO heard like others do.These are fantastic little sensors. I had a bit of a hard time getting started with them, but once I got things going they're very reliable and accurate.In order to use them, you'll need to set the TRIG pin high for a bit, then listen to the ECHO pin and see how long it's "HIGH". Based on the amount of time it remains high, you can do a bit of math and figure out the distance.I ran into some of these a while ago that only had 3 pins on them, and they tended to become unresponsive if they didn't hear an echo back. I didn't run into that problem with these. They're great.I did a detailed write-up of how to use them, including schematics and code here:[...] 5More fun than a belfry of bats!This thing is so much fun! It is very accurate and I was able to get it to sense things out to about 16 feet. I used it for two different halloween props this year. Since it is actively pinging and returning distance readings (as instructed by your Arduino code), you can trigger different things to happen as your victim approaches. One thing at 15 feet, another at 10 a third at 5, etc. The other prop was designed to drop a spider on a persons head when they got to a particular spot exactly. exactly! It worked perfectly every time. The only thing I found a little troublesome but easy to fix, was that you can't shoot this sensor straight down like you can a PIR sensor. The ping needs to bounce off something large enough to reflect the ping back to the sensor. Heads and shoulders do not seem to consistently be big enough to do that. So...PIR for very general motion sensing. This thing for accurate distance measuring.There are several places on-line where you can find instructions and code for this four pin sensor. The Paralax sensor only has three pins, but all of the code can be used for this one whith one little tweak.I'm very happy with this sensor and will probably buy many more next year! 5Bad for my projectIt doesn't work well on my project. I actually want to give one star but it gives right value when it responds. I needed a distance sensor to check if there is something passes by within particular range. I tested a lot with all sensors I received today and also PING))) sensor I already have. PING))) sensor returns a value every time I pass by the sensor but this HC-SR04 sensor returns a value SOMETIMES. Not sensitive sensor at all and it's bad for my project. I don't care if it returns accuracy value or not. I just wish it returns a value all the time when it needs. I'm curious if other customers don't have this problem. Just go with PING))) if you want a distance sensor which works all the time when you need. I wasted my money. 2Solid, inexpensive, and delivered quicklyNow this is a nice and solid piece of hardware. The unit sits flush against the breadboard, has mounting holes pre-drilled, and is overall a very nicely-done package. This is a fun little module. There is more to it than simply reading a switch or sending out a digital High/Low voltage. Buy a couple of these, get a motor shield, tack together a maze, and create a robot that follows one wall until it breaks free, or just let it patrol the room perimeter. Good for a few feet of accurate measurement, so it's great for lots of projects.Both pieces I purchased through this seller have functioned perfectly, and I would gladly choose to buy through them again if given the opportunity. 5I use it for my robotPlease, check its action on my robot: "Arduino-based light sensing and obstacle avoiding autonomous robot." on YoutubeDownside of this sensor: it occupies 2 pins on Arduino (trigger of the signal and sensor of the echo). Voltage and ground I do not count. More expensive model has only one pin - it triggers and receives the signal (plus voltage and ground pins, of course).Upsides: very cheap!, super precise!!! I measured with the tape distance it sends to computer - very accurate, almost to millimeters. The maximum distance is 6 meters. One cm further will show still 6 m. One cm closer will show 5m 99cm. So, it feels that 6m limit is not physical, but technical limit, it just "does not want" to measure anything beyond 6m. That is fine for my robot project.Downsides of this type of sensors in general: 1) it sends very narrow beam, so the obstacle a little on the side from the beam would not be seen; 2) soft fabric or wool absorbs the beam and sensor does not see the obstacle. For example, if you point it at the center of your chest and you have a sweater, than sensor would not see you and show 6m distance. That is why my robot needed not only ultrasonic sensor, but also "stupid" touch sensor. 5Accurate, but only at short distancesI'm an engineering student who needed a sensor for obstacle avoidance in an autonomous boat competition. This sensor is cheap and works, but the advertised range of 3 meters is not achievable. Beyond 1 meter, the readings are completely unusable, and even at closer distances, I had to take the median of 5 pulses to filter out all of zeros that it would return between valid measurements.For most hobbyists experimenting with programming and small scale robotics, this would probably fit the bill, but my boat traveled at high speed and 1 meter didn't give enough time to react, so an alternative had to be devised. At $6 though, its cheap, and worth experimenting with if your building something where the range limitation isn't an issue. 3better code would fix that upI don't have a project for this yet, but I did test it. Being the only one of these I have ever used, I can't compare it to other companies. I can tell you it works, both with Leonardo and mega, and is very accurate in measuring distances. Up to 30' is how far I went, down to 3 inches. it does get a little confused under 10 inches, but I'm sure, better code would fix that up. I did not use much math in my code, and I think timing delays would solve the close proximity confusion. IE (under a foot it reads all over the place 1 inch to 10' etc) I try to be as honest and accurate as I can. I use comments like this to make buying decisions. If you see a bad review from me and buy anyway you will kick yourself. If you do one please use more words than "good deal" or "great" It helps us all. Overall I find this well built, great price and I plane on getting more of the same before price goes up. 5Worked very well!Bought two of these. They easily hook into the Arduino. Sketch/code is out there to easily program it. I had my $8 remote control Walmart car ripped apart, combined with $15 Arduino, $12 motor shield, and this in less than an hour. Then programmed it to detect obstacles 2 feet away (does 4 inch, maybe less, to 20 feet/size-of-medium room or more), backup turning left, and go forward trying again. Car was bad, so it only did a 15 degree turn or so. But enough times it would go around most obstacles in my room. It did not detect small rods or tubes. But for nearly everything else it worked great. Getting a Gyroscope module to detect when it is stuck (how it shakes stuck vs const velocity should give me what I need). 5Accurately Measures Distance to WaterI'm using it with a Raspberry Pi 3 and it works great so far. I'm using it to track the water level in a plastic bin (17 gallon Home Depot) and it is really accurate. When the bin is empty, it detects 32.4 cm from sensor to bottom of bin, when full, it detects around 5 cm which is exactly right if I measure it with a tape measure. If you are measuring water and using another system to fill the water, make sure you let the water settle before pinging for the distance. The setup in the photo here is not yet complete. Ultimately this will supply a rain gutter grow system and a pump will fill the bin. The ping sensor will be used to let the pump know when to turn off and on based on depth reading. 5
See All Reviews
Return And Refund Policy
  • Return or exchange requests can be made within 10 days of the delivery date.
  • To return or exchange any items, please email us at info@directnine.uk, clearly mentioning your order number and our customer support team will guide you on the process.
  • To be eligible for return, products must be in the exact condition you received them in. All packaging material must be undamaged and unused with the price tags intact.
  • Orders can be cancelled before dispatch. If the order has already been dispatched, cancellation fees might be charged.
  • Due to the nature of the products that we sell, we will not be able to replace or refund unwanted items if they have been opened or any seals are broken.
  • The refund will not include the import duties or the cost of delivery or return postage.
  • If your refund is approved, then it will automatically be credited to the original method of payment, within 7-10 days.
  • DirectNine reserves the right to alter and enforce this Return and Refund Policy at any time without having to serve a prior notice to users.
Delivery Policy
Shipment tracking ID will be provided after your product(s) is dispatched. The delivery date stated is indicative and subject to availability, payment authorization, verification, and processing. In case your product(s) is not delivered due to an incorrect or invalid address, we will not be able to process any claims. However, we will notify you if it is returned to us.

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