skip to Main Content

Compact easy to use thermometer with large display.

317C Pocket Digital Thermometer

Faster response time for ambient air temperatures.

  • Air tip
  • Field calibrate to ±2°F
  • Rugged and waterproof (IP63)
  • 3.1mm stem for “Pete’s” plug
  • Penetration tip
  • Auto off
  • Magnetic clip perfect for air duct applications
  • 3-year limited warranty

Where to Buy TPI Products

317c 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”.

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

317c Manual

317c Data Sheet

317c Instructions

317C Field Calibration Instructions

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 317c 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  Air
 Water Resistant  N/A
 Water Proof  N/A
 °C / °F Selectable  Yes
 Data Hold  Yes
 Auto Off  Yes
 Battery Type  LR44

Model 317c 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.

Model 317c Demonstration Video

Back To Top