Top-down view of the Klein Tools ET05 Digital Pocket Thermometer showing the 3-inch stainless steel probe securely nested within its black protective sheath. The orange and black body features a high-visibility backlit LCD display and intuitive buttons for Celsius and Fahrenheit toggling, data hold, and Max/Min/Average functions.
Product feature infographic for the Klein Tools ET05 digital thermometer. The graphic highlights a measurement range of -40 to 482 degrees Fahrenheit, a backlit LCD display, a built-in pocket clip, and Max/Min/Average diagnostic functions. Icons verify a 3-meter drop protection rating and CE certification.
Perspective view of the ET05 pocket thermometer illustrating its compact and rugged design. The image showcases the ergonomic orange housing and the sleek black sheath, emphasizing its portability for HVAC field service technicians and maintenance professionals.
The Klein Tools ET05 shown with the protective sheath removed, exposing the 3-inch stainless steel temperature probe. The sheath is positioned below the tool, demonstrating how it can be detached and reattached to the back of the device to serve as an extended handle for reaching deep into air ducts.
Rear view of the ET05 digital thermometer highlighting the integrated heavy-duty pocket clip mounted on the black sheath. This design allows the HVAC tester to be securely fastened to a shirt pocket or tool pouch for rapid access during system inspections.
Side profile view of the Klein Tools ET05 illustrating the slim, lightweight construction of the thermometer. The image highlights the secure fit between the orange sensor body and the black protective probe cover, ideal for high-mobility professional environments.
Action shot of the ET05 Digital Pocket Thermometer being used to measure air temperature at a supply vent. The technician's hand holds the thermometer while the backlit display indicates a clear reading of 91.5 degrees Fahrenheit, demonstrating its effectiveness for checking HVAC airflow and system performance.
Top-down view of the Klein Tools ET05 Digital Pocket Thermometer showing the 3-inch stainless steel probe securely nested within its black protective sheath. The orange and black body features a high-visibility backlit LCD display and intuitive buttons for Celsius and Fahrenheit toggling, data hold, and Max/Min/Average functions.
Product feature infographic for the Klein Tools ET05 digital thermometer. The graphic highlights a measurement range of -40 to 482 degrees Fahrenheit, a backlit LCD display, a built-in pocket clip, and Max/Min/Average diagnostic functions. Icons verify a 3-meter drop protection rating and CE certification.
Perspective view of the ET05 pocket thermometer illustrating its compact and rugged design. The image showcases the ergonomic orange housing and the sleek black sheath, emphasizing its portability for HVAC field service technicians and maintenance professionals.
The Klein Tools ET05 shown with the protective sheath removed, exposing the 3-inch stainless steel temperature probe. The sheath is positioned below the tool, demonstrating how it can be detached and reattached to the back of the device to serve as an extended handle for reaching deep into air ducts.
Rear view of the ET05 digital thermometer highlighting the integrated heavy-duty pocket clip mounted on the black sheath. This design allows the HVAC tester to be securely fastened to a shirt pocket or tool pouch for rapid access during system inspections.
Side profile view of the Klein Tools ET05 illustrating the slim, lightweight construction of the thermometer. The image highlights the secure fit between the orange sensor body and the black protective probe cover, ideal for high-mobility professional environments.
Action shot of the ET05 Digital Pocket Thermometer being used to measure air temperature at a supply vent. The technician's hand holds the thermometer while the backlit display indicates a clear reading of 91.5 degrees Fahrenheit, demonstrating its effectiveness for checking HVAC airflow and system performance.
KLEIN TOOLS

Klein Tools Thermometer ET05 Digital Pocket HVAC Air Duct Tester (3 Inch Stainless Steel Probe Backlit LCD Ambient Direct Contact Temperature Testing)

Only 2 left
SKU: ET05
$19.98 USD

Description

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Audit Climate Register Output and Measure Liquid Line Heat Differentials Instantly with Stainless Steel Direct Contact Testing Logic

The Klein Tools ET05 is a digital manual-operating pocket probe test thermometer engineered for executing ambient and direct-contact air duct thermal diagnostics up to 482°F. This field service instrument introduces an integrated reach-extending storage sheath that transitions into a rigid handle extension to cross-examine deep terminal frames. Operating with a 3-inch industrial stainless steel entry tip, the device provides real-time maximum, minimum, and average tracking metrics across a backlit liquid crystal screen to map structural climate conditions inside dark attic mechanical spaces.

Best Used For:

  • Air Duct Profiling: Inserting the reach-extended probe deep into supply and return registers to log thermal transfer variables.
  • Liquid Line Diagnostics: Pressing the stainless steel tip against fluid lines to analyze active mechanical heat balancing loops.
  • Ambient Chamber Sweeps: Unsheathing the compact tool inside attics or crawlspaces to evaluate baseline atmospheric baseline conditions.

Key Performance & Safety Features

  • Reach-Extending Sheath: Protective cover attaches securely to the tool base to function as an extension rod for restricted HVAC enclosures.
  • FDA GRAS Compliant Core: Hardened 3-inch immersion sensor probe utilizes high-purity stainless metal to maintain industrial grading standards.
  • Backlit Data Matrix Screen: High-contrast digital screen populates illuminated value fields to clear workspace viewing obstacles inside dark vaults.
  • Advanced Analytical Toggles: Onboard memory architecture captures real-time maximum, minimum, baseline average, and data hold values seamlessly.
  • Automated Energy Conservation: Integrated internal timer routine cuts device power after 15 minutes of idle status to defend button battery life.

What's Included

  • ET05 Digital Pocket Thermometer
  • Protective Sheath with Pocket Clip
  • Two LR44 Button Cell Batteries
  • Instruction Manual

Technical Specifications

Thermal Monitored Span: -40° to 482° F
Standard Sensor Accuracy: ±2.7° F (At Nominal Room Temperature)
Sensor Probe Material: FDA GRAS Compliant Stainless Steel
Sensor Probe Length: 3.0 Inches
Power Source Requirements: 2 x LR44 Button Cells (Included)
Automated Safety Shut-Off: Yes, Triggers After 15 Minutes Inactive
Display Interface Profile: Digital Backlit LCD Display Screen
Tester Chassis Length: 6.5 Inches
Tester Chassis Width: 1.08 Inches
Tester Chassis Height: 0.94 Inches
Net Operating Weight: 1.4 oz. (With Batteries Installed)
Pro-Tip: When gathering supply trunk data, nest the pocket clip directly into the sheath cap link; this safely secures the assembly as a rigid handling wand to prevent losing your tester inside internal sheet metal panel slots.