Ammeters

Ammeters provide an accurate way of measuring and displaying current within a circuit. They are designed for panel mounting and are used across a range of industrial applications. These metered instruments measure current flow in amperes. The ampere level of the current is displayed on using either an analogue scale or digital readout. The current is presented in draw (how much current flows) or continuity (how uninterruptable the current is). Learn more about the different types of ammeters in our complete guide to ammeters.

What are digital panel ammeters?

Digital ammeters feature a programmable bar-graph scale that allows both minimum and maximum values to be set, enabling a custom scale, dependant on the needs of the application. The digital display can be programmed to change colour, flash or change annunciator message. These panel meters often feature triggers that can be programmed to sound an alarm when a critical point has been reached. The digital meter can also be set to trip when values exceed, fall behind, are between or are outside set points.

What are analogue panel ammeters?

Analogue panel ammeters determine whether erratic loads exist in electrical circuits. High ampere levels may indicate short-circuiting, unintentional grounding or indicate a defective component in the network. Low current flow points to high resistance or weak flow in the circuit.

Types of analogue panel ammeters

Analogue panel ammeters come in five types:

  • Moving coil: where magnetic deflection causes the coil to move when the current passes through the coil
  • Moving magnet: where the coil is mounted in the metered case, and a permanent magnet moves the needle
  • Moving iron: where an iron needle moves in response to an electromagnetic force from the coil.
  • Electrodynamic: where an electrodynamic magnet responds to alternating and direct current movement
  • Hot wire: where current passes through a wire that expands when heated, indicating low or high ampere levels

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Description Price Maximum Value Current Type Moving Element Cutout Height Cutout Width Depth Meter Accuracy Minimum Temperature Maximum Temperature Approvals Measurement Range Minimum Displayed Value Series
RS Stock No. 177-0262
Mfr. Part No.3NJ6900-4HK11
BrandSiemens
$78.64
Each
units
500A AC Moving Iron - - - - - - CE Certified 1 → 500A 1A 3NJ6900
RS Stock No. 177-0256
Mfr. Part No.3NJ6900-4HH22
BrandSiemens
$232.26
Each
units
300A AC - - - - - - - CE Certified 5 → 300A 5A 3NJ6900
RS Stock No. 177-0232
Mfr. Part No.3NJ6900-4HB21
BrandSiemens
$78.64
Each
units
50A AC Moving Iron - - - - - - CE Certified 5 → 50A 5A 3NJ6900
RS Stock No. 886-1939
Mfr. Part No.EQ94-I2022N1CAW0ST
$21.97
Each
units
60A AC Moving Iron 96mm 96mm 62mm - -10°C +55°C 2004 / 108 / EC (EMC Directive), 2006 / 95 / EC (Low Voltage Directive) and Amendment 93 / 68 / EEC, CE, DIN 40050, DIN 43701, DIN 43718, DIN 43802, DIN 43807, DIN 46200, DIN 46282, DIN EN 60051, DIN IEC 61554, EC 51, EC 529, IEC 1010, IS:1248, IS:9249, U 0 → 60A 0A Sigma
RS Stock No. 177-0243
Mfr. Part No.3NJ6900-4HF11
BrandSiemens
$78.64
Each
units
200A AC Moving Iron - - - - - - CE Certified 1 → 200A 1A 3NJ6900
RS Stock No. 177-0248
Mfr. Part No.3NJ6900-4HG12
BrandSiemens
$232.26
Each
units
250A AC - - - - - - - CE Certified 1 → 250A 1A 3NJ6900
RS Stock No. 914-5385
Mfr. Part No.D72SD5A/0-300A
BrandHOBUT
$42.69
Each
units
0/300A For 300/5A CT AC Moving Iron 72mm 72mm 38.5mm Class 1.5 -25°C +40°C BS89, CE, DIN 43700, DIN 43802, IEC 51, UL 94V0, UL 94V1 0/300A For 300/5A CT 0A D72SD
RS Stock No. 177-0236
Mfr. Part No.3NJ6900-4HD12
BrandSiemens
$232.26
Each
units
100A AC - - - - - - - CE Certified 1 → 100A 1A 3NJ6900
RS Stock No. 195-9131
Mfr. Part No.CUB4CL20
BrandRed Lion
$365.21
Each
units
- DC - 33mm 68mm 49.8mm - 0°C +60°C - 4 → 20 mA, 10 → 50 mA - CUB4CL
RS Stock No. 201-969
Mfr. Part No.EQB 48 MB: 25/50A SCALA: 0-25/50A
$30.95
Each
units
25/50A AC Moving Iron 45mm 45mm 53mm Class 1.5 -25°C +40°C - - - -
RS Stock No. 914-5402
Mfr. Part No.D72SD5A/0-1600A
BrandHOBUT
$42.06
Each
units
0/1600A For 1600/5A CT AC Moving Iron 72mm 72mm 38.5mm Class 1.5 -25°C +40°C BS89, CE, DIN 43700, DIN 43802, IEC 51, UL 94V0, UL 94V1 0/1600A For 1600/5A CT 0A D72SD
RS Stock No. 886-1840
Mfr. Part No.EQ44-I2022N1CAW0ST
$21.97
Each
units
60A AC Moving Iron 48mm 48mm 72mm - -10°C +55°C 2004 / 108 / EC (EMC Directive), 2006 / 95 / EC (Low Voltage Directive) and Amendment 93 / 68 / EEC, CE, DIN 40050, DIN 43701, DIN 43718, DIN 43802, DIN 43807, DIN 46200, DIN 46282, DIN EN 60051, DIN IEC 61554, EC 51, EC 529, IEC 1010, IS:1248, IS:9249, U 0 → 60A 0A Sigma
RS Stock No. 392-8462
Mfr. Part No.9651025050B
$36.28
Each
units
250A AC Moving Iron 92mm 92mm 53mm Class 1.5 - +23°C - - - -
RS Stock No. 886-1935
Mfr. Part No.EQ94-I1822N1CAW0ST
$21.97
Each
units
40A AC Moving Iron 96mm 96mm 62mm - -10°C +55°C 2004 / 108 / EC (EMC Directive), 2006 / 95 / EC (Low Voltage Directive) and Amendment 93 / 68 / EEC, CE, DIN 40050, DIN 43701, DIN 43718, DIN 43802, DIN 43807, DIN 46200, DIN 46282, DIN EN 60051, DIN IEC 61554, EC 51, EC 529, IEC 1010, IS:1248, IS:9249, U 0 → 40A 0A Sigma
RS Stock No. 177-0247
Mfr. Part No.3NJ6900-4HG11
BrandSiemens
$78.64
Each
units
250A AC Moving Iron - - - - - - CE Certified 1 → 250A 1A 3NJ6900
RS Stock No. 392-9724
Mfr. Part No.9651020040B
$35.98
Each
units
400A AC Moving Iron 92mm 92mm 53mm Class 1.5 - +23°C - - - -
RS Stock No. 177-0250
Mfr. Part No.3NJ6900-4HG21
BrandSiemens
$78.64
Each
units
250A AC Moving Iron - - - - - - CE Certified 5 → 250A 5A 3NJ6900
RS Stock No. 886-2014
Mfr. Part No.PQ74-V0FL2N1CAW0ST
$32.44
Each
units
75mV DC Moving Coil 68mm 68mm 54mm - -10°C 55°C 2004 / 108 / EC (EMC Directive), 2006 / 95 / EC (Low Voltage Directive) and Amendment 93 / 68 / EEC, CE, DIN 40050, DIN 43701, DIN 43718, DIN 43802, DIN 43807, DIN 46200, DIN 46282, DIN EN 60051, DIN IEC 61554, EC 51, EC 529, IEC 1010, IS:1248, IS:9249, U Maximum of 75mV - Sigma
RS Stock No. 196-8468
Mfr. Part No.IS 11009
$105.77
Each
units
20mA DC Moving Coil 32.3mm 73.7mm 30.5mm ±1.5 % -25°C +55°C - - - -
RS Stock No. 177-0245
Mfr. Part No.3NJ6900-4HF21
BrandSiemens
$78.64
Each
units
200A AC Moving Iron - - - - - - CE Certified 5 → 200A 5A 3NJ6900