Precision Plus Thermometer

Model #222-550

Interchangeable RTD probes
Super high accuracy to ±0.05°C (±0.1°F)
Accepts 3- or 4-wire 1/10 din RTD probes
Range to 1562°F (850°C)
Resolution to 0.01°

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The platinum RTD is the sensor of choice when a wide range is required with better accuracy than a thermocouple can offer. This meter can be used interchangeably with any of our growing selection of RTD probes. You can also use this meter with sensors of the same type from other manufacturers (order the optional spare connector). Each meter is calibrated against resistance standards simulating temperature. A factory calibration certificate is included with data at two temperatures. We offer other calibration options including additional temperature points or a calibration of the meter with a probe of your choice tested as a "system".

Designed for hard daily use with a big, easy-to-read display. The optional attaché cases give you a safe place to store or carry the thermometer and probes. The rubber boot protects the meter from hard knocks.

Range -328 to 1562°F (-200 to 850°C)
Accuracy (meter) ±0.1°F (±0.05°C)
Resolution 0.01° Auto-ranging to 0.1° above 199.9°
Sensor 3W or 4W RTD 1/10 DIN
Probe Interchangeable (sold separately)
Battery 3 x AAA, 2000 hours
Dimensions 1" x 2.2" x 5" (25mm x 56mm x 128mm)
Weight 4.6 oz. (130 g)
Certificate NIST-Traceable Certificate included

Handheld Immersion Probe

Model: 160-222

ThermoWorks Image
Features a rigid stainless steel sheath with 1/8" diameter. Used in liquids or gases. High accuracy for use with Precision Plus thermometer.
Sensor Range: -58 to 392°F (-50 to 200°C)
Handle (ABS blend): Max temp 221°F (105°C)
Cable: 14 to 221°F (-10 to 105°C)
Time Constant: Less than 4 seconds typical in liquid. Less than 20 seconds full reading.
Accuracy: ±0.05°F (±0.03°C) at 32°F (0°C); ±0.22°F (±0.06°C) at 212°F (100°C)
Termination: 5-pin Binder connector


High Accuracy Liquid Probe

Model: 160-446

ThermoWorks Image
Features a rigid stainless steel sheath with 1/8" diameter. Used in liquids or gases. High accuracy for use with Precision Plus thermometer.
Sensor Range: -58 to 392°F (-50 to 200°C)
Handle (ABS blend): Max temp 221°F (105°C)
Cable: 14 to 221°F (-10 to 105°C)
Time Constant: Less than 4 seconds typical in liquid. Less than 20 seconds full reading.
Accuracy: ±0.05°F (±0.03°C) at 32°F (0°C); ±0.22°F (±0.06°C) at 212°F (100°C)
Termination: 5-pin Binder connector


Rubber Boot

Rubber Boot

Model: THS-830-253

  • Provides added protection
  • Water resistant to IP63 when installed
  • Easily removed for cleaning
Protects the Precision Plus from drops, bumps and kitchen splashes. Is easily removed for cleaning. Can be used in conjuction with wall bracket (832-050).


Rubber Boot

Rubber Boot with Probe Holder

Model: THS-830-255

  • Provides added protection
  • Water resistant to IP63 when installed
  • Easily removed for cleaning
  • Retains standard probe when not in use
Same as 830-253 boot but includes rear exterior grooves for retaining standard probes when not in use.


Wall Bracket

Wall Bracket

Model: THS-832-050

  • Stores meter and probe
  • Prevents drops & bumps
  • Keeps unit close to work area
Keeps meter and probe close to work area with handy wall mount hole.


Hard Case

Light Duty Storage Case

Model: 10210

  • Customized soft foam
  • Dual Latches
  • Fits meter & probes
  • Light-duty
Stores meter and probes. Custom soft foam protects from drops & bumps. Lots of room for probes and spare batteries. Two latches keep lid closed in transit.


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Binder Connector

Model: 99-0413-00-05

  • IP67 water resistant
  • Screw-down design
  • Adapts RTD probes to Precision and Precision Plus meters
Connect your own RTD probes to the Precision and Precision Plus RTD meters. Pin-out drawing included with meter user manual. IP67 water resistant connector with screw down design to lock in probe to meter.



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