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133 Digital Multimeter

133 Digital Multimeter


Large easy to read display in full size DMM; 1,000 DC volts and 750 AC volts; 0.5% DCV basic accuracy.

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SKU: 133 Category: Tags: , ,


Large easy to read display in full size DMM; 1,000 DC volts and 750 AC volts; 0.5% DCV basic accuracy.

  • Large easy to read 2,000 count display
  • 0.5% DCV basic accuracy
  • 0 to 750 ACV; max resolution 1mV
  • 0 to 1,000 DCV; max resolution 0.1mV
  • 0 to 20MΩ; max resolution 0.1Ω
  • 0 to 10 amps AC/DC; 0.1uA resolution
  • Data Hold
  • cULus 61010-1
  • CAT II – 1000V, CAT III – 600V


 Model 133 Specifications
 DC Volts  Maximum Input: 1000V

 Maximum Resolution: 0.1mV

 Accuracy: +/-0.5%
 AC Volts  Maximum Input: 750V

 Maximum Resolution: 0.1mV

 Accuracy: +/-0.8%
 DC Amps  Maximum Input: 10A

 Maximum Resolution: 0.1μA

 Accuracy: +/-0.5%
 AC Amps  Maximum Input: 10A

 Maximum Resolution: 0.1μA

 Accuracy: +/-0.75%
 Resistance (Ohms)  Maximum Input: 20MΩ

 Maximum Resolution: 0.1mΩ

 Accuracy: +/-0.75%
 Frequency  N/A
 Capacitance  N/A
 Inductance  N/A

 (K-Type Thermocouple)

 Continuity  Audible at less than 100Ω
 Diode  2.5V at 1mA maximum output
 Duty Cycle  N/A
 True RMS Responding  No
 Conductance  No
 Pulse Width  No
 Data Hold  Yes
 Min/Max Record  No
 Time Stamp Logging  No
 Relative Mode  No
 Compare Mode  No
 RS-232 Output  No
 Process Loop Output  No
 Sleep Mode / Auto Off  No
 Protective Boot  Yes (standard)
 Display Type  4000 count LCD
 Range Selection  Auto / Manual
 Operating Temperature  32°F to 104°F (0°C to 40°C)
 Storage Temperature  14°F to 122°F (-10°C to 50°C)
 Humidity  80% non-condensing
 Size  7.4” x 3.4” x 1.2” (187mm x 86mm x 33mm) with boot
 Weight  12oz (340g) with boot
 Battery Type  9V Alkaline (NEDA 1604)
 Battery Life  500hrs Typical
 OverInput Category  CAT III 600V
 Agency Approval  cULus 61010-1, IEC 61010-1
 Warranty  3 Years


Model 133 Applications

  • Thermocouples in furnaces or gas applications
  • Heat anticipator current in thermostats
  • Line and control voltage
  • Flame safety control current
  • Heating element resistance
  • Continuity of wiring
  • Line current up to 10 amps
  • Power supply current

Tech Tips

Category Ratings:

  • Category I: Usually electronic equipment or equipment where measures have been taken to limit transient over voltages.
  • Category II: Single phase loads like appliance personal computers, television sets, and other household loads. Outlets located more than 30 feet froma CAT III source or more than 60 feet from a CAT IV source.
  • Category III: Distribution level fixed installations like distribution panel devices, short branch and feeder circuits, three phase loads, and single phase commercial lighting.
  • Category IV: Equipment and lines located on the power line side of a service panel or where a low voltage connection is made to utility power


Frequently Asked Questions

1. Is there a way to measure higher current with a TPI DMM?

TPI DMMs (except the 120 and 126) have the capacity to read up to 10A AC/DC. Optional adapters are available for all models to increase the current range. Our shunt adapters are available to increase the range up to 1,000A AC/DC.

2. What other adapters are available for TPI DMMs?

Various adapters including carbon monoxide (A771), pressure (A620/630), and clamp-on low current (A254) are available. Contact TPI for additional information.

3. Which of the TPI DMMs will measure temperature?

All TPI DMMs can measure temperature by using the optional A301 K-Type thermocouple temperature adapter.

4. Which TPI DMMs can measure DC millivolts?

All TPI DMMs measure millivolts. Models are available with 1 or 0.1 millivolt resolution.

5. Which TPI DMMs can measure DC microamps?

The TPI 126, 133, 135, 153, 163, 183, 190, 194, 196, and 440 all have this capability.

6. Which TPI DMMs will measure capacitance?

The TPI 135, 183, 190, 192, 194, and 440 all have this capability.

7. What is continuity?

Continuity refers to a test performed on wires and circuits to see if a break(open) exhists. If the wire or circuit is continuous, the resistance reading will be at or near zero. The continuity range on a meter provides audible indication of a continuous circuit, allowing quicker tests without having to take your eyes off the circuit or wire under test.

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