The Best Hcsro4 Range Sensor

There are 4 pins out of the module: VCC , Trig, Echo, GND. So it’s a very easy interface for controller to use it ranging. 
The all process is: pull the Trig pin to high level for more than 10us impulse, the module start ranging; 
Finish ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level. 
So we can calculated the distance easily: Distance = ((Duration of high level)*(Sonic :340m/s))/2

Excelity HC-SR04 Ultrasonic Moudle is to measure the distance of object by 40KHz ultrasonic sound wave. This moulde provides 2cm-400cm non-contact measurement function, the ranging accuracy can reach to 3mm. It is great for the project that need distance measurement, such as Distometer,intelligent robot navigation system,etc.

Module main technical parameters:
-Working Voltage : 5V(DC)
-Static current: Less than 2mA
-Output signal: Electric frequency signal, high level 5V, low level 0V
-Sensor angle: Not more than 15 degrees
-Detection distance: 2cm-450cm.
-High precision: Up to 0.3cm
-Input trigger signal: 10us TTL impulse
-Echo signal : output TTL PWL signal

Pin definition:
-VCC: connect to 5V DC
-Trig(T): control pin, connect to a standard I/O port
-Echo(R):receiving end, connect to a standard I/O port
-GND: Connect to Ground

Notes:
-1. The module should be inserted in the circuit before been powered to avoid producing high level of misoperation; if producted, power it again.
-2. Before connect to VCC terminal, the GND terminal should be connected the module first,otherwise,it will affect the normal work of the module.

Module Working Principle:
-1. Pull the Trig pin to high level for more than 10us impulse, the module start ranging.
-2. The module automatically sends eight 40KHz square wave to detect whether a signal is returned.
-3. Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level.
-4. Calculated the distance, the distance = (high level time * sound velocity (340M/S) / 2.

Package included:
-3pcs HC-SR04 Moulde
-3pcs Mounting Bracket

Longruner 5 x HC-SR04 Ultrasonic Sensor, for ArduinoIDE Distance Sensor Robot XBee ZigBee with Ultrasonic Transmitter and Receiver Module The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats do. It offers excellent non-contact range detection with high accuracy and stable readings in an easy-to-use package. From 2cm to 500 cm or 1” to 13 feet. It operation is not affected by sunlight or black material like Sharp rangefinders are (although acoustically soft materials like cloth can be difficult to detect). It comes complete with ultrasonic transmitter and receiver module. Features: Power Supply: +5V DC Quiescent Current: Working Current: 15mA Effectual Angle: Ranging Distance: 2cm – 500 cm/1″ – 13ft Resolution: 0.3 cm Measuring Angle: 30 degree Trigger Input Pulse width: 10uS Dimension: 45mm x 20mm x 15mm Pins VCC: +5VDC Trig: Trigger (INPUT) Echo: Echo (OUTPUT) GND: GND Package includes: 5* HC-SR04 Ultrasonic Distance Sensor 1*HC-SR04 Bracket 1*Male to Femal jump wires 20pin 10*cable ties for fixing HC-SR04(as a gift) NOTE: If the HC-SR04 does not receive an echo then the output never goes low. Devantec and Parallax sensors time out after 36ms and I think 28ms respectively. If you use Pulsin as above then with no return echo the program will hang for 1 second which is the default timeout for Pulsin. You need to use the timeout parameter. If you have any question, please be free to contact us, we will try our best to help you. Service Email: [email protected]

Key Features: -Provides precise, non-contact distance measurements within a 2 cm to 3 m range -Ultrasonic measurements work in any lighting condition, making this a good choice to supplement infrared object detectors -Simple pulse in/pulse out communication requires just one –I/O pin -Burst indicator LED shows measurement in progress -3-pin header makes it easy to connect to a development board, directly or with an extension cable, no soldering required

Description:
TFmini-s is a upgraded single-point micro ranging module based on TFmini. The blind zone is shortened to 10cm, the outdoor performance and accuracy of different reflectivity are improved, it can achieve stable, accuracy, sensitive and high frequency range detection.
TFmini-s is compatible with both the UART and I2C interface. Different interfaces can be switched by commands.

Performance:
Operating Range : 0.1m~12m90%Reflectivity
Accuracy: ±6cm@(0.1-6m), ±1% @ (6m-12m)
Distance Resolution: 1cm
Frame Rate: 100Hz
Ambient Light Immunity: 70Klux
Operating Temperature: 0℃~60℃

Optical Parameters:
Light Source: VCSEL
Central Wavelength: 850nm
Photobiological Safety: Class1 (EN60825)

Electrical Parameters: 
Supply Voltage: 5V±0.1V
Average Current: ≤140mA
Power Consumption: ≤0.7W
Peak Current: 200mA
Communication Level: LVTTL(3.3V)
Communication Interface: UART / I2C

Main application scenario:
Pedestrian detection
Vehicle detection
Intelligent barrier gate and altimeter

Package Including:
1 * TFmini-s UART / I2C Laser Range Finder Module
2 * Cable

The general purpose ultrasonic level transmitter provides continuous level measurement up to 49.2″ (1.25m) with a selectable 0-5 VDC, 0-10 VDC or 976-2000 Hz frequency signal output, and is configured via our free WebCal software. Select the voltage output for interface with analog input cards. Select the frequency output for interface with discrete input cards. This non-contact liquid level sensor is ideally suited for corrosive, sticky or dirty liquids, and is widely selected for small day tank, skid, IBC, sump and process tank level applications. Range: 49.2″ (1.25m). Accuracy: 0.125″ (3mm). Resolution: 0.019″ (0.5mm). Dead band: 2″ (5cm). Beam width: 2″ (5cm). Configuration: WebCal PC Windows USB 2.0. Memory: Non-volatile. Supply voltage: 12-28 VDC. Consumption: 0.5W. Signal output: 0-5 V, 0-10 V, 976-2000 Hz. Frequency: Sink current, 15 mA nominal. Signal invert: 5-0 V, 10-0 V, 2000-976 Hz. Signal fail-safe: Full, empty or hold last. Process temperature: F: 20 to 140d egree C: -7 to 60 degree. Temperature comp.: Automatic. Ambient temperature: -31 to 140 degree F, -35 to 60 degree C. Pressure: MWP = 30 PSI (2 bar). Enclosure rating: Type 6P, encapsulated,corrosion resistant and submersible. Enclosure material: Polycarbonate. Strain relief mat: Santoprene. Trans. material: PVDF. Cable jacket material: Polyurethane. Cable type: 6-conductor, shielded. Cable length: 48″ (1.2m). Process mount: 1″ NPT. Mount gasket: Viton. Classification: General purpose. Compliance: CE, RoHS. Approvals: cFMus.