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Red handheld electrician tool with display and sensor probe

Sentry

Sentry ST-732 Hot Wire IR Thermo-Anemometer Electrician Tool

SKU CH-GXB6-YF0DC MPN ST-732

Measures air velocity and temperature with a hot-wire sensor plus a built-in infrared thermometer reading surfaces up to 537 °C

  • Labor warranty1 Year
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Simultaneous air velocity and temperature readings on one screen
  • Hot-wire sensor gives precise low-flow measurements
  • Infrared thermometer reads surface temperatures up to 537 °C
  • Multiple airflow units including m/s, km/h, ft/min, knots, mph
  • Auto power-off after 10 minutes idle to save battery

Hot-wire IR thermo-anemometer for electricians

The Sentry ST-732 combines a sensitive hot-wire sensor with a built-in infrared thermometer to measure air velocity and surface temperature simultaneously. It reads velocity in m/s, km/h, ft/min, knots and mph plus CMM airflow. The IR sensor reaches 537 °C (999.5 °F) at an 8:1 distance-to-spot ratio. Auto power-off triggers after 10 minutes on battery or 30 minutes with AC power.

Suited for HVAC balancing and duct airflow checks

Technicians who need simultaneous velocity, airflow and non-contact temperature readings in one handheld instrument will find the ST-732 useful. Buyers who require a higher 30:1 optical ratio for smaller targets at distance, or who need CFM readouts instead of CMM, should look at other models in the series. The tool is not intended for laboratory-grade traceability or data-logging applications.

Handheld instrument for field measurements

The meter operates on battery power for portable use and accepts AC supply for extended bench sessions. Its hot-wire probe delivers rapid response even at low velocities, reducing the need for separate vane or pitot accessories. A single-box pack includes the unit with three-year parts coverage and one-year labour coverage, so the kit is ready for immediate job-site deployment.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $317.99
Pricier than about 88% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSENTRY
Model nameST-732
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What power source does the ST-732 need to operate?

The instrument runs on battery power and includes an AC power option; with AC connected the auto-off delay extends from 10 to 30 minutes.

Can I use the infrared thermometer on the ST-732 to check duct surface temperatures while measuring airflow?

Yes, the built-in IR thermometer reads remote surface temperatures up to 537 °C (999.5 °F) at an 8:1 distance-to-spot ratio while the hot-wire sensor measures velocity.

How do I confirm the ST-732 is giving correct airflow readings after turning it on?

Verify that the display shows simultaneous air velocity and ambient temperature in your chosen units (m/s, km/h, ft/min, knots, mph or CMM) and that values respond instantly to changes in the airstream.

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