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315C Pocket Digital Thermometer

Compact easy to use thermometer with large display. Auto field calibrate to ±2˚F in less than 10 seconds using ice water.
  • Field calibrate to ±2°F
  • Tapered stem (3.1 mm diameter) to fit into a Pete’s Plug
  • Reinforced, heavy-duty housing for strength
  • Waterproof (IP63)
  • Penetration tip
  • -58°F to 300°F (-50°C to 150°C)
  • Fits in your pocket
  • 3-year limited warranty

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

315C Instructions

315C Data Sheet

Where to Buy TPI Products

315C Operating Instructions
To measure temperature with this unit follow these simple instructions:

Selecting Fahrenheit or Celsius mode:

  • With the unit “OFF” press and continue to hold the ON/ OFF button.
  • The LCD will alternate between °F and °C. Release the ON/OFF button when desired measurement mode appears on the LCD
  • Remove the protective sheath from the stem.
  • Press the ON/OFF button.
  • Insert stem into area or object to be tested. At least 1/2” of the stem must be inserted.

Warning: The stem is a sharp and pointed object which can be dangerous.

The Data Hold function is used by pressing the D-H button when taking a measurement. The measurement will flash on the LCD when Data Hold is in use. To return to normal function, press and release the D-H button a
second time.

Press the ON/OFF button to end operation, or the unit will automatically power off after 35 minutes.

To reverse the LCD to suit your viewing angle:
Insert a small coin into notch in curved area “B”, then gently pry portion “A” from “B”. Shielded wires will keep the two parts connected. Twist the area “A” 180° and snap back into area “B”.

Get more accurate readings by using the right tip for your thermometer:

  • Penetration: Use for immersion and air; air response time will be slower than if using anactual air probe.
  • Chisel: Need chisel tip for surface temperatures. Penetration and/or air tips will not givean accurate surface reading.
  • Air: Samples air temperatures three times faster than penetration or contact tips.
  • Contact: Measures three times faster than chisel tip.
 Model 315C Specifications
 Temperature Range  -58°F to 300°F (-50°C to 150°C)
 Accuracy  +/-2°F (+/-1°C)
 Resolution  0.1°F
 Sample Rate  1 reading every 1.5 seconds
 Stem Length  2.8""
 Tip Type  Penetration
 Water Resistant  Yes
 Water Proof  N/A
 °C / °F Selectable  Yes
 Data Hold  Yes
 Auto Off  Yes
 Battery Type  LR44

TPI Model 315C Demonstration Video

Model 315C Applications

HVACR
• Ambient Air
• Calibrate Thermostats
• Vents
• Compressor Heads
• Registers

ELECTRICAL
• Motor Temperatures
• Transformer Temperatures

Frequently Asked Questions

How do I check calibration of my pocket thermometer?

Place thermometer in a solution of crushed ice and water, swirl the water around and temperature should read close to 32°F.

Does the whole stem need to be immersed to get an accurate reading?

The sensor is in the tip of the probe and needs to be 1/2 inch into whatever you are measuring.

What battery does my pocket thermometer use?

The LR44 button battery is used in TPI pocket digital thermometers.

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