![]() | Mini Meters Mfg. Co. Pvt. Ltd
IMT, Faridabad, Haryana GST No. 06AAECM3896M1ZV |
We are Manufacturer, OEM Supplier and Exporters of vast range of Amperemeters / Ampere Meters / Amperio Meters / Automotive Instruments since 1980. To know about the other models and their complete technical details, please float your request at minimeters@gmail.com or visit our website: www.minimetersindia.com
Price on Request: Get Latest Price
Minimum Order Quantity | 50 Unit |
Model Name/Number | MM-0712B |
Brand | MINIMETER |
Usage/Application | GENERATORS/TRACTORS/CARS |
Display Type | Analog |
Material | CAST IRON/ABS |
Color | BLACK |
Country of Origin | Made in India |
Zero-center ammeters are used for applications requiring current to be measured with both polarities, common in scientific and industrial equipment. Zero-center ammeters are also commonly placed in series with a battery. In this application, the charging of the battery deflects the needle to one side of the scale (commonly, the right side) and the discharging of the battery deflects the needle to the other side. A special type of zero-center ammeter for testing high currents in cars and trucks has a pivoted bar magnet that moves the pointer, and a fixed bar magnet to keep the pointer centered with no current. The magnetic field around the wire carrying current to be measured deflects the moving magnet.
Since the ammeter shunt has a very low resistance, mistakenly wiring the ammeter in parallel with a voltage source will cause a short circuit, at best blowing a fuse, possibly damaging the instrument and wiring, and exposing an observer to injury.
It's a moving coil ammeter. It uses magnetic deflection, where current passing through a coil placed in the magnetic field of a permanent magnet causes the coil to move. It uses two spiral springs to provide the restoring force. The uniform air gap between the iron core and the permanent magnet poles make the deflection of the meter linearly proportional to current. These meters have linear scales. Basic meter movements can have full-scale deflection for currents from about 25 microamperes to 10 milliamperes.
Because the magnetic field is polarised, the meter needle acts in opposite directions for each direction of current. A DC ammeter is thus sensitive to which way round it is connected; most are marked with a positive terminal, but some have centre-zero mechanisms and can display currents in either direction. A moving coil meter indicates the average (mean) of a varying current through it, which is zero for AC. For this reason, moving-coil meters are only usable directly for DC, not AC.
The ideal ammeter has zero internal resistance. But practically the ammeter has small internal resistance. The measuring range of the ammeter depends on the value of resistance.Price on Request: Get Latest Price
Product BrochureMinimum Order Quantity | 100 Piece |
Model Name/Number | MM-0704 |
Brand | MINIMETER |
Usage/Application | Industrial |
Casing Size | 52 mm/ 60 mm |
Discharge indicator | Optional in 60 mm |
Bulb Type | BA 9S12 |
Bulb Voltage | 24V |
Standard Features:
Over 125 Varieties in Standard Range.
Centre Zero Type
Moving Magnet Construction
Heavy Duty Brass Bolts
Standard Range & Specifications:
Casing: 52mm, 60mm, 1-5/8", 2-1/16", 2-5/8"
Range: 30/50/60 (without shunt), 80/100 (with shunt) Amps
Low Charge Indicator: Optional in 60mm
Bezel: Chrome plated / Black Painted
Bolts: M5 / M8
Earthing: Negative or Insulated
Input Signal: Dynamo
Illumination: 6V/12V/24V (Optional)
Note:
It is possible to customize dial, pointer, calibration, etc. if volume requirements are met.
Price on Request: Get Latest Price
Minimum Order Quantity | 100 Units |
Model Name/Number | MM-0706.CR |
Brand | MINIMETER |
Material | CAST IRON/ABS |
Color | BLACK/WHITE |
Packaging Type | CORRUGATED BOXES |
Country of Origin | Made in India |
Zero-center ammeters are used for applications requiring current to be measured with both polarities, common in scientific and industrial equipment. Zero-center ammeters are also commonly placed in series with a battery. In this application, the charging of the battery deflects the needle to one side of the scale (commonly, the right side) and the discharging of the battery deflects the needle to the other side. A special type of zero-center ammeter for testing high currents in cars and trucks has a pivoted bar magnet that moves the pointer, and a fixed bar magnet to keep the pointer centered with no current. The magnetic field around the wire carrying current to be measured deflects the moving magnet.
Since the ammeter shunt has a very low resistance, mistakenly wiring the ammeter in parallel with a voltage source will cause a short circuit, at best blowing a fuse, possibly damaging the instrument and wiring, and exposing an observer to injury.
It's a moving coil ammeter. It uses magnetic deflection, where current passing through a coil placed in the magnetic field of a permanent magnet causes the coil to move. It uses two spiral springs to provide the restoring force. The uniform air gap between the iron core and the permanent magnet poles make the deflection of the meter linearly proportional to current. These meters have linear scales. Basic meter movements can have full-scale deflection for currents from about 25 microamperes to 10 milliamperes.
Because the magnetic field is polarised, the meter needle acts in opposite directions for each direction of current. A DC ammeter is thus sensitive to which way round it is connected; most are marked with a positive terminal, but some have centre-zero mechanisms and can display currents in either direction. A moving coil meter indicates the average (mean) of a varying current through it, which is zero for AC. For this reason, moving-coil meters are only usable directly for DC, not AC.
The ideal ammeter has zero internal resistance. But practically the ammeter has small internal resistance. The measuring range of the ammeter depends on the value of resistance.