Reed Instruments R5040 1000A AC/DC Clamp Meter with Temperature and Non-Contact Voltage Detector - True RMS

Reed Instruments

Key Features:

  • Measures AC/DC current/voltage, resistance, capacitance, frequency, duty cycle and temperature
  • 50000-count backlit LCD display and analog bargraph
  • Low battery and overrange indicators
  • Built-in non-contact voltage detector with LED indicator
  • True RMS AC measurements
  • Min/Max, display hold and relative mode
  • Diode test and continuity check functions
  • Durable double molded plastic housing
  • Cat. III 600V safety rating

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This autoranging True RMS clamp meter is capable of measuring AC/DC current and voltage, resistance, frequency, capacitance, duty cycle and temperature. Featuring a 50,000 count backlit LCD display with a 61-segment analog bargraph and double molded plastic housing, the R5040 includes keeps track of min/max readings and includes a non-contact voltage detector built into the clamp tip.



  • • AC/DC True RMS Clamp Meter
  • • Test Leads
  • • Thermocouple Wire Probe
  • • Thermocouple Adapter
  • • Battery
  • • Soft Carrying Case
AC/DC Current
Range 500, 1000A
Accuracy AC: ±(2.8% rdg. +30 dgt.)
DC: ±(2.5% rdg. +30 dgt.)
Resolution 0.01, 0.1, 1A
AC/DC Voltage
Range AC: 500mV, 5, 50, 500, 750V
DC: 500mV, 5, 50, 500, 1000V
Accuracy AC: ±(1.0% rdg. +30 dgt.)
DC: ±(0.1% rdg. +4 dgt.)
Resolution AC/DC: 0.1mV, 0.001, 0.01, 0.1, 1V
Range 500Ω, 5, 50, 500kΩ, 5, 50MΩ
Accuracy ±(1.0% rdg. +4 dgt.)
0.1Ω, 0.001, 0.01, 0.1kΩ, 0.001, 0.01MΩ
Range 500, 5000nF, 50, 500µF, 5mF
Accuracy ±(3.5% rdg. +10 dgt.)
Resolution 0.01, 0.1nF, 0.01, 0.1μF, 0.1mF
Range 10kHz
Accuracy ±(0.3% rdg. +2 dgt.)
Resolution 0.001Hz
Range -148 to 1832°F (-100 to 1000°C)
Accuracy ±(1.0% rdg. + 4.5°F)
±(1.0% rdg. + 2.5°C)
Resolution 1°F, 1°C
General Specifications
Range Selection Autoranging / Manual
True RMS Yes
Display 50,000 count LCD display
Display Hold Yes
Max/Min Yes
Relative Mode Yes
Diode Test Yes
Backlit Display Yes
Analog Bargraph Yes (61-segment)
Continuity Check Audible signal if resistance <35Ω
Duty Cycle Yes
Non-Contact Voltage Detector Yes
Autoshut off Yes (after 15 mins)
Power Supply 9V Battery
Low Battery Indicator Yes
Jaw Opening 1.5" (40mm), up to 500 MCM
Overvoltage Category CAT. III 600V 
Product Certifications CE
Operating Temperature 32 to 122°F (0 to 50°C)
Storage Temperature -4 to 140°F (-20 to 60°C)
Dimensions 9.1 x 3.0 x 1.5" (232 x 77 x 39 mm)
Weight 9.6oz (271g)
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