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400 Series True RMS


Price starts at $264.99

Product Code : EX470-NIST

Manufacturer : Extech

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Download or View this product's / series details and specifications Specifications (PDF)


  • Non-contact InfraRed thermometer measures surface temperature of objects unsafe to contact or difficult to reach
  • Input fuse protection and mis-connection warnings with audible and visible signals
  • Auto power off, Data Hold
  • True RMS AC measurements
  • Relative function
  • Type K thermometer, Capacitance, Frequency, and Duty Cycle
  • Complete with CAT III test leads, multi-position tilt stand, hanging strap, holster with test lead storage, bead wire temp probe, and 9V battery


True RMS Autoranging Multimeter plus IR Thermometer. This meter measures AC/DC Voltage, AC/DC Current, Resistance, Capacitance, Frequency, Duty Cycle, Diode Test, and Continuity plus Thermocouple and Non-Contact IR Temperature. Proper use and care of this meter will provide many years of reliable service.


Input Protection Limits
V DC or V AC 600V DC/AC, 200Vrms on 400mV range
mA AC/DC 500mA 250V fast acting fuse
A AC/DC 20A 250V fast acting fuse(30 seconds max every 15 minutes)
Frequency, Resistance, Capacitance, Duty Cycle, Diode Test, Continuity 250Vrms for 15sec max
Temperature 60V DC/24V AC
Diode Test Test current of 0.3mA maximum, open circuit voltage 1.5V DC typical
Continuity Check Audible signal will sound if the resistance is less than 150Ω (approx.), test current <0.7mA
Temperature Sensor Requires type K thermocouple
IR Spectral response 6 to 16μm
IR Emissivity 0.95 fixed
IR distance ratio 8:1
Input Impedance >7.5M Ω (VDC & VAC)
AC Response True rms
ACV Bandwidth 50Hz to 1kHz
Crest Factor <3:1 at full scale & <6:1 at half scale
Display 4000 count backlit liquid crystal
Overrange indication ?OL? is displayed
Auto Power Off 15 minutes (approximately)
Polarity Automatic (no indication for positive); Minus (-) sign for negative
Measurement Rate 2 times per second, nominal
Low Battery Indication ? ? is displayed if battery voltage drops below operating voltage
Battery One 9 volt (NEDA 1604) battery
Fuses mA, μA ranges; 0.5A/250V fast blow A range; 20A/250V ceramic fast blow
Operating Temperature 41°F to 104vF (5°C to 40°C)
Storage Temperature -4°F to 140°F (-20°C to 60°C)
Operating Humidity Max 80% up to 87°F (31°C) decreasing linearly to 50% at 104°F(40°C)
Storage Humidity <80%
Operating Altitude 7000ft. (2000meters) maximum.
Weight 0.753lb (342g) (includes holster).
Size 7.36? x 3.2? x 2.0? (187 x 81 x 50mm) (includes holster)
Safety For indoor use and in accordance with the requirements for double insulation to IEC1010-1 (1995), EN61010-1 (1995) Overvoltage CategoryIII, Pollution Degree 2.
NIST Certificate Included.
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