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Red handheld environmental tester with hot wire probe and infrared sensor

Sentry

Sentry ST-730 Hot Wire Thermo Anemometer Infrared Thermometer

SKU CH-2H4M-FKMBM MPN ST-730

Measures air velocity and temperature with a hot-wire sensor plus an infrared thermometer reaching 537 °C

  • Labor warranty1 Year
  • Color and finishRed
  • Number of items1 pack
  • Sold asBox
  • Parts warranty3 Years
  • Measures air velocity and temperature simultaneously using hot-wire sensor
  • Hot-wire plus thermistor give rapid, precise readings even at low flow
  • Infrared thermometer reads remote surfaces up to 537 °C (999.5 °F)
  • Switches between m/s, km/h, ft/min, knots and mph units
  • Auto power-off after 10 minutes idle, 30 minutes on AC power

What this tool measures

The Sentry ST-730 combines a hot-wire anemometer with an infrared thermometer for environmental testing. It displays air velocity and ambient temperature at the same time. The hot-wire sensor gives rapid, precise readings even at low air speeds. Infrared measurement reaches 537°C (999.5°F) with an 8:1 distance-to-spot ratio.

When to choose this over simpler meters

Basic vane anemometers struggle at low flow rates where the hot wire excels. Separate IR thermometers add cost and bulk for surface-temperature checks. This unit merges both functions, saving time on HVAC balancing, duct inspection and equipment diagnostics. The jump is worth it when you need simultaneous velocity and remote surface data in one hand.

How it fits in a technician's kit

The meter runs on battery power and auto-powers off after 10 minutes idle, or 30 minutes with AC power connected. It reads velocity in m/s, km/h, ft/min, knots and mile/h. The red housing is a single packed unit backed by three years parts and one year labour coverage. No additional probes or modules are required for the stated functions.

How it compares

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

Price $312.99
Pricier than about 88% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSENTRY
Model nameST-730
Color and finishRed
In the box
Number of items1 pack

Questions about this item

What power source does the ST-730 need for the 30-minute auto-off setting instead of 10 minutes?

The ST-730 extends its auto power-off from 10 minutes to 30 minutes when connected to an AC power supply.

Which measurement units can the ST-730 display for air velocity?

The ST-730 shows air velocity in m/s, km/h, ft/min, knots and mile/h.

How often should the hot-wire sensor on the ST-730 be checked or replaced?

The manufacturer provides a 3-year parts warranty covering the hot-wire sensor; follow the manual's calibration schedule for ongoing accuracy.

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