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 Priced to Clear Series
RS Stock No. 177-0231
Mfr. Part No.3NJ6900-4HB12
BrandSiemens
£124.39
Each
Units
50A AC - - - - - - - CE Certified 1 → 50A 1A - 3NJ6900
RS Stock No. 177-0257
Mfr. Part No.3NJ6900-4HJ11
BrandSiemens
£42.42
Each
Units
400A AC Moving Iron - - - - - - CE Certified 1 → 400A 1A - 3NJ6900
RS Stock No. 177-0232
Mfr. Part No.3NJ6900-4HB21
BrandSiemens
£42.42
Each
Units
50A AC Moving Iron - - - - - - CE Certified 5 → 50A 5A - 3NJ6900
RS Stock No. 177-0265
Mfr. Part No.3NJ6900-4HK22
BrandSiemens
£124.39
Each
Units
500A AC - - - - - - - CE Certified 5 → 100A 5A - 3NJ6900
RS Stock No. 177-0258
Mfr. Part No.3NJ6900-4HJ12
BrandSiemens
£124.39
Each
Units
400A AC - - - - - - - CE Certified 1 → 400A 1A - 3NJ6900
RS Stock No. 177-0244
Mfr. Part No.3NJ6900-4HF12
BrandSiemens
£124.39
Each
Units
200A AC - - - - - - - CE Certified 1 → 200A 1A - 3NJ6900
RS Stock No. 177-0234
Mfr. Part No.3NJ6900-4HB22
BrandSiemens
£124.39
Each
Units
50A AC - - - - - - - CE Certified 5 → 50A 5A - 3NJ6900
RS Stock No. 177-0268
Mfr. Part No.3NJ6900-4HL21
BrandSiemens
£42.42
Each
Units
600A AC Moving Iron - - - - - - CE Certified 5 → 600A 5A - 3NJ6900
RS Stock No. 177-0263
Mfr. Part No.3NJ6900-4HK12
BrandSiemens
£124.39
Each
Units
500A AC - - - - - - - CE Certified 1 → 500A 1A - 3NJ6900
RS Stock No. 177-0242
Mfr. Part No.3NJ6900-4HE22
BrandSiemens
£124.39
Each
Units
150A AC - - - - - - - CE Certified 5 → 150A 5A - 3NJ6900
RS Stock No. 177-0266
Mfr. Part No.3NJ6900-4HL11
BrandSiemens
£42.42
Each
Units
600A AC Moving Iron - - - - - - CE Certified 1 → 600A 1A - 3NJ6900
RS Stock No. 177-0248
Mfr. Part No.3NJ6900-4HG12
BrandSiemens
£124.39
Each
Units
250A AC - - - - - - - CE Certified 1 → 250A 1A - 3NJ6900
RS Stock No. 177-0251
Mfr. Part No.3NJ6900-4HG22
BrandSiemens
£124.39
Each
Units
250A AC - - - - - - - CE Certified 5 → 250A 5A - 3NJ6900
RS Stock No. 177-0253
Mfr. Part No.3NJ6900-4HH12
BrandSiemens
£124.39
Each
Units
300A AC - - - - - - - CE Certified 1 → 300A 1A - 3NJ6900
RS Stock No. 177-0259
Mfr. Part No.3NJ6900-4HJ21
BrandSiemens
£42.42
Each
Units
400A AC Moving Iron - - - - - - CE Certified 5 → 400A 5A - 3NJ6900
RS Stock No. 177-0245
Mfr. Part No.3NJ6900-4HF21
BrandSiemens
£42.42
Each
Units
200A AC Moving Iron - - - - - - CE Certified 5 → 200A 5A - 3NJ6900
RS Stock No. 177-0235
Mfr. Part No.3NJ6900-4HD11
BrandSiemens
£42.42
Each
Units
100A AC Moving Iron - - - - - - CE Certified 1 → 100A 1A - 3NJ6900
RS Stock No. 177-0238
Mfr. Part No.3NJ6900-4HD22
BrandSiemens
£124.39
Each
Units
100A AC - - - - - - - CE Certified 5 → 100A 5A - 3NJ6900
RS Stock No. 177-0269
Mfr. Part No.3NJ6900-4HL22
BrandSiemens
£124.39
Each
Units
600A AC - - - - - - - CE Certified 5 → 600A 5A - 3NJ6900
RS Stock No. 177-0230
Mfr. Part No.3NJ6900-4HB11
BrandSiemens
£42.42
Each
Units
50A AC Moving Iron - - - - - - CE Certified 1 → 50A 1A - 3NJ6900