A current sensor is a device that detects and converts current to an easily measurable output voltage, which is proportional to the current through the measured path. There are a wide variety of sensors, and each sensor is suitable for a specific current range and environmental condition. Among these sensors, a current sensing resistor is the most commonly used. It can be considered a current-to-voltage converter, where inserting a resistor into the current path, the current is converted to voltage in a linear way. The technology used by the current sensor is important because different sensors can have different characteristics for a variety of applications.
Digital Voltmeter Ammeter
While a DMM is great for a quick check, a panel-mount current and voltmeter is handy when you need to constantly monitor a system. Battery-backed systems can be quickly diagnosed by checking the overall system voltage, run times can be calculated based on the instantaneous current consumption rates. For all those times and more, it's just super handy to have a meter available. Proto-Pic has digital Voltmeter Ammeter 30V 10A which is long lasting product.
Non-Invasive Current Sensor
Non-invasive current sensor (also known as a "split core current transformer") can be clamped around the supply line of an electrical load to tell you how much current is passing through it. It does this by acting as an inductor and responding to the magnetic field around a current-carrying conductor.
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SparkfunMSRP:Now: £4.96Was:Digital Voltmeter Ammeter 30V 10A Red and Blue While a DMM is great for a quick check, a panel-mount current and voltmeter is handy when you need to constantly monitor a system. Battery-backed systems can be quickly diagnosed by checking the overall...MSRP:Now: £4.96Was:Qty in Cart: 0Quantity:Price:MSRP:Now: £4.96Was:Subtotal:
MSRP:Now: £16.00 - £24.00Was:The ACS724 current sensor carrier board range by Pololu are breakout boards for Allegro’s ACS724 Hall effect-based linear current sensors. Operating from 4.5 V to 5.5 V for use in 5 V systems. Each board comes with a 3 pin male breakaway...MSRP:Now: £16.00 - £24.00Was:Qty in Cart: 0Price:MSRP:Now: £16.00 - £24.00Was:Subtotal:
PololuMSRP:Now: £4.00Was:Current Sensor Carrier -15.5A to +15.5A - ACS711EX This board is a simple carrier of Allegro’s ±15.5 A ACS711 Hall effect-based linear current sensor with overcurrent fault output, which offers a low-resistance (~0.6 mΩ) current...MSRP:Now: £4.00Was:Qty in Cart: 0Quantity:Price:MSRP:Now: £4.00Was:Subtotal:
SparkfunMSRP:Now: £11.50Was:SparkFun SEN-12040 Current Sensor Breakout - INA169The INA169 is a high-side current monitor, which means that you place a resistor (a shunt resistor ) on the positive power rail and the INA169 measures the voltage drop across that resistor. The INA169...MSRP:Now: £11.50Was:Qty in Cart: 0Quantity:Price:MSRP:Now: £11.50Was:Subtotal: