Crompton DC Potentiometer

Precision instrument for measuring DC voltage and calibrating equipment.

POROMETISTO CM06Pro Smart Clamp Meter, True-RMS 600A and 1000A AC/DC, Clamp-on Digital Multimeter with Inrush Current, VFD Mode, LoZ, NCV Non-Contact Voltage Tester, Measures Temp Capacitance Resistance Frequency Continuity Diode (with Case & Leads), Diy,
Free shipping

POROMETISTO CM06Pro Smart Clamp Meter, True-RMS 600A and 1000A AC/DC, Clamp-on Digital Multimeter with Inrush Current, VFD Mode, LoZ, NCV Non-Contact Voltage Tester, Measures Temp Capacitance Resistance Frequency Continuity Diode (with Case & Leads), Diy,

9 sold
-35%$65.00$100.00
Proster Clamp Meter TRMS 6000 Counts Amp Clamp with AC/DC Current Voltage Capacitance Resistance Diode Temperature Continuity NCV/Live Clamp Multimeter Portable Tool Kit
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Proster Clamp Meter TRMS 6000 Counts Amp Clamp with AC/DC Current Voltage Capacitance Resistance Diode Temperature Continuity NCV/Live Clamp Multimeter Portable Tool Kit

5.037 sold
-23%$45.99$59.99
FNIRSI DMC-100 High-Precision Non-Contact Digital Clamp Meter, 10000 Counts, 600A AC Current, NCV Voltage Detector, 2.0-inch 240×320 TFT Screen, 3.7V 1500mAh USB-Charged, Curve Waveform View, Data-Saving, 750V Capability, Electrician Work Tool
Free shipping

FNIRSI DMC-100 High-Precision Non-Contact Digital Clamp Meter, 10000 Counts, 600A AC Current, NCV Voltage Detector, 2.0-inch 240×320 TFT Screen, 3.7V 1500mAh USB-Charged, Curve Waveform View, Data-Saving, 750V Capability, Electrician Work Tool

4.62.8K sold
Limited time deal
-40%$62.39$103.97
POROMETISTO CM02 6000 Counts True RMS Digital Clamp Meter - 40mm Jaw Opening, Inrush Tests, VFD, NCV Voltage Detector, ℃/℉ Switch, Alkaline Battery, 2 Test Leads, 1 Thermocouple, 1 English User Manual - Professional Electrical Tester for HVAC, Automotive
Free shipping

POROMETISTO CM02 6000 Counts True RMS Digital Clamp Meter - 40mm Jaw Opening, Inrush Tests, VFD, NCV Voltage Detector, ℃/℉ Switch, Alkaline Battery, 2 Test Leads, 1 Thermocouple, 1 English User Manual - Professional Electrical Tester for HVAC, Automotive

7 sold
-21%$86.90$110.00
Digital Multimeter Tester AC DC Volt Ohm Amp Clamp Meter Auto Range LCD Handheld
Free shipping

Digital Multimeter Tester AC DC Volt Ohm Amp Clamp Meter Auto Range LCD Handheld

5 sold
$24.99
FNIRSI DPS-150 DC Power Supply Variable 30V 5A 4 Digit IPS Flip Display The Device Supports PC Based Quality Testing Utilizes Copper Wiring And Includes Protections against Overvoltage Overcurrent Short Circuits And Overheating
Free shipping

FNIRSI DPS-150 DC Power Supply Variable 30V 5A 4 Digit IPS Flip Display The Device Supports PC Based Quality Testing Utilizes Copper Wiring And Includes Protections against Overvoltage Overcurrent Short Circuits And Overheating

4 sold
Limited time deal
-40%$57.99$96.65
DC Voltage Detector, 12V-24V LED Digital Voltmeter Ammeter, Current And Voltage Monitoring Panel

DC Voltage Detector, 12V-24V LED Digital Voltmeter Ammeter, Current And Voltage Monitoring Panel

4.3135 sold
$7.42
Multifunctional Clamp Meter ST181, Digital Multimeter Tester AC DC Volt Ohm Amp Auto Range LCD Handheld, Smart Measurement Measures AC/DC Voltage, AC Current, Resistance, and Tests Continuity Professional Electrician Tools, 4000 Counts, Test Meter

Multifunctional Clamp Meter ST181, Digital Multimeter Tester AC DC Volt Ohm Amp Auto Range LCD Handheld, Smart Measurement Measures AC/DC Voltage, AC Current, Resistance, and Tests Continuity Professional Electrician Tools, 4000 Counts, Test Meter

4.738 sold
$30.00
Digital Multimeter, Multimeter with AC DC Voltmeter & Ohm Volt Amp Tester, Multifunction Tester, Pocket Meter with Backlight Tests Wire, Tester Measure Current Resistance Diode

Digital Multimeter, Multimeter with AC DC Voltmeter & Ohm Volt Amp Tester, Multifunction Tester, Pocket Meter with Backlight Tests Wire, Tester Measure Current Resistance Diode

5.031 sold
Limited time deal
-48%$20.38$39.16
POROMETISTO-UT01C Type-C USB Tester, DC4-30V 0-12A Electrical Measuring Tool with 1.14 inch IPS Digital Display, 240W/280.0W 3.3-40V Multifunctional Power Meter, PD/QC/PPS Fast Charging Protocol Detector

POROMETISTO-UT01C Type-C USB Tester, DC4-30V 0-12A Electrical Measuring Tool with 1.14 inch IPS Digital Display, 240W/280.0W 3.3-40V Multifunctional Power Meter, PD/QC/PPS Fast Charging Protocol Detector

4.6458 sold
-19%$29.97$37.00
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Introduction

Accurate voltage measurement is critical in labs, classrooms, and field service work.

  • Slide-wire design provides fine resolution for small adjustments
  • Built-in galvanometer indicates null point without external meters
  • Portable case protects against dust and transport damage

Review specifications to match your calibration needs.

FAQs

Standard models offer accuracy within 0.05 percent of the measured range.

Yes, a Weston standard cell provides the reference voltage for periodic checks.

Reversing switches allow measurement of either polarity without rewiring.

Inspect and clean slide-wire contacts every six months to maintain low contact resistance.

Basic electrical safety knowledge is sufficient; follow the included manual for setup.