An ammeter is a device which measure electrical current in amperes. It can serve as a laboratory instrument, be mounted on a DIN rail or a panel or be portable.
These instruments are used primarily in electric power systems to keep track of current level in supply lines.
Analog, needle ammeters operate without a power source and indicate the effective RMS of the current. The moving coil ammeter is polarized and must be connected in the right direction unless it has been modified for AC measurement. Moving iron and hot-wire models are not polarized.
The digital ammeter uses a shunt resistor. Current value is calculated by applying Ohm's Law to the small voltage drop. Effective current is calculated as true RMS, and remains accurate whatever the wave form. Resistance measurement depends on range, which can be automatic, manual or determined by encoder.
A clamp-on ammeter is a portable model which clamps around the current conductor, rather than having to be wired into the circuit. Most can measure high DC, as well as AC values. Special pico-, nano- or microammeters, are designed to measure very weak currents. Fiber optic models are used in very high voltage applications.
Choice will depend on the nature of the current to be measured, AC or DC, and the range of values the meter must indicate.
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Digital AC / DC ammeter max. 2 000 | Fluke 355 / 353 FLUKE
Versatile and rugged tools for applications with high currents Confidently take reliable readings with the True-rms, Fluke 355 and 353 digital clamp meters; the tools of choice for high...
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DIN-rail mounted digital ammeter SIEMENS Low-Voltage & Products
These devices for measuring voltages and currents can be used for monitoring input and output currents or device currents in electric...
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Digital AC ammeter 0 - 0.19 A | ACA-20RM-0-AC3-RL-C Murata Power Solutions
Murata Power Solutions new ACA-20RM Series are the worlds rst digital ac-ammeters to incorporate a built-in current transformer (CT) to directly measure the true-rms value of complex, non-sinusoidal ac currents from 2 to 50A no bulky and expensive 5A donut CTs are required! Operation and setup is straightforward: simply pass the load-carrying wire through the on-board CT, apply power, and the...
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Pico-ammeter 1fA - 20mA | 2502 Keithley Instruments
The Model 2502 Dual-Channel Picoammeter provides two independent picoammeter-voltage source channels for a wide range of low level measurement applications including laser diode testing. The Model 2502 is also designed to increase the throughput of Keithley's LIV (lightcurrent- voltage)...
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Analog ammeter Schneider Electric - Electrical Distribution
Ammeters measure the current flowing through an electric circuit in amps. Voltmeters measure the potential (voltage) difference...
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Digital AC / DC ammeter max. 1 000 A, 1 000 V | HT9022 HT
HT9022 is a combination of a power quality analyzer, a phase sequence/conformity detector, a clamp meter and a voltage detector in one single handy device. The advanced design of HT9022 ensures reliable and accurate measurements under...
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Digital DC ammeter max. 20 A, 2 000 V | DP-D96A-DC series Yueqing Hean Electrical Co., Ltd.
Model 0P-D96A-DC, DP-D72A-DC. DP-D-18A-DC Feature: l.Display:3 1/2 digital LEO d«spiay(red or green) 2 Accuracy:0.5% ± Idigit 3 Auxiliary power AC 110V...
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Digital ammeter NEMA 4X, IP65, 0.48 ", 200 µA - 200 mA | CUB5I Red Lion Controls
:: CUB5I :: * Four Selectable D.C. Ranges 200 µA, 2 mA, 20 mA, 200 mA * Minimum and Maximum Display Capture * LCD, Reflective...
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Digital ammeter ELM Contrel elettronica
MULTIFUNCTIONAL AMMETER MEASURING NETWORK’S CURRENT OR DIFFERENTIALS FLUSH MOUNTING DIN...
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Digital ammeter max. 2 A | CAM120 Christ-Elektronik
For direct current and alternate voltage up to 350 VDC/250...
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Single phase digital ammeter MA12 SELEC Controls Pvt. Ltd.
Single Phase Ammeter - MA12 - 4 digit, 7...
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Zero resistance ammeter (ZRA) max. 0.02 A | CS 2 Bank Elektronik - Intelligent Controls GmbH
CS 2 Multi - channel current sink is used as zero-resistance-ammeter e.g. for measurement of...
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Digital ammeter A 9648 Martens Elektronik GmbH
Digital-Amperemeter A 9648 Measuring- and indicating range separately programmable DIN 96x48mm Mounting depth 100mm (with current transformer 120mm) Panel cut-out...
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Pico-ammeter 9103 USB RBD Instruments Inc
Almost every vacuum lab has a Keithley picoammeter and some kind of bias supply to measure electron or ion currents in a vacuum chamber. The concept of the 9103 USB Picoammeter is to provide a...
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Analog ammeter BA series LUMEL
Maximum ammeters - BA and BE series are destined to measure the averaging RMS value of a a.c. current, in a 8 or 15 minutes’ period. An additional red pointer, displaced by the black pointer, shows the maximal current value...
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Analog ammeter Automatische Mess- und Regeltechnik GmbH
Square switch panel meters compliant with DIN 43700 * Front frame dimensions: 48x48 mm, 72x72 mm, 96x96 mm and 144x144 mm * Moving coil and moving iron meters for measuring electrical current and voltage,...
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Analog DC ammeter 1 - 50 A | K241 - K261 series Weschler Instruments
Type K-241 & 261 instruments have been designed to achieve the ultimate in reliability and performance. Instruments of this class are recommended for use on electric utility switchboards and process...
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PXI nano-ammeter module Chroma Ate Europe
The 52961 NANO-AMP Meter is a single slot PXI module designed to make fast Optical Power measurements and store the results of a sequence of Measurements. The unit has 2 channels for power measurement. Each channel...
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Analog AC ammeter 0 - 180 A | 016 Fiesta series Crompton Instruments
016 Series Fiesta Indicators A robust range of short-scale 31⁄2" surface mount panel meters offering IP55 protection...
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Digital AC ammeter max. 1 600 A, 25.8 kV ENTEC ELECTRIC & ELECTRONIC CO.,LTD
This wireless current meter minimizes personnel and measuring costs and prevents damage by over load selecting proper capacity for the pole mounted transformer. Characteristics Microprocessor...
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Analog ammeter with maximeter 0 - 6 A | B45 DEIF
DIN rail instrument – B45 DIN rail mounted bimetallic instruments (maximum demand ammeters) are specifically suitable for thermic...
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Analog ammeter with maximeter ERBC series Revalco
COMBINED MAXIMUM DEMAND AMMETERS ERBC72 - ERBC96 (90° interchangeable scale plate) BURDEN of the moving iron system: 0,3-5-1,2 VA of the bimetal system: 2,5 VA ACCURACY CLASS of...
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Analog ammeter with maximeter max. 100 A | RQT / TE IME
RQTE - Analog Meters for alternating current with thermal - moving-iron equipment 72x72mm 96x96mm Detection of mean and instantaneous load...
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NETCONTROL - Measurement and display of voltages and currents in 3-phase A.C. mains -...
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Digital ammeter RDA1A Toscano Linea Electronica
Adjustable max-min set points. Possibility of activation delay in output contact, from 0 to 999 secs. Password protection...
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Digital ammeter True Rms, 2 000 pts | LED2472A ELC
Digital ammeter Ref : LED2472A 3½ digits LED display Ammeter Configurable,...
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Digital ammeter max. 5 000 A, 600 V SIGMA ELEKTRIK SAN. VE TIC.LTD.STI
Digital Panelmeter Sigma Digital Panelmeters are produced for measuring AC current and Voltage in...
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Analog ammeter 60 - 2 000 A | CT - TMB - TMBE series ELEQ
ELEQ Transformer meters, meter combined with splitcore CT, TMB and TMBE series Primary current...
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DIN-rail mounted digital ammeter PERRY ELECTRIC
Ammeter for alternate current measurements 2 DIN Digital modular ammeter for alternate...
