Extech TM26 NSF Certified Temperature Indicator

Fits food, agriculture, and lab monitoring that needs an NSF-certified IP65 temperature indicator with a remote stainless penetration probe — −40 to 200 °C (−40 to 392 °F), programmable high/low alarms, magnetic / stand / wall mount — not a dewpoint calibrator or 4–20 mA transmitter.

Key advantages

Range / resolution — −40 to 200 °C (−40 to 392 °F) RTD penetration probe; 0.1 °C/°F resolution.
Accuracy — ±1 °C / ±1.8 °F basic (OEM datasheet); FLIR page also lists banded 0.5 / 1.0 / 2.0 °C by range.
Probe — 4.1 in (105 mm) stainless-steel penetration probe with 5 ft (1.5 m) cable.
Alarms / sealing — Programmable high/low audible and visual alarms; IP65 meter and sensor; NSF and CE.
Mounting / power — Magnetic back, removable foot stand, or wall mount; 1 × CR2032 (3 V); 3.4 × 2.2 × 1.2 in (86 × 57 × 30 mm); 3.2 oz (90 g).

Typical applications

Food cold-chain and prep-area monitoring where NSF marking is required.
Agriculture and lab baths that need a remote penetration probe plus local LCD alarms.
Walk-in cooler / freezer spot indicators with magnetic or wall mount.
Temporary QA checks that need Hi/Lo audible-visual alarms without a process transmitter.

Selection guide

Temperature band — Confirm points sit in −40 to 200 °C (−40 to 392 °F).
Probe geometry — Fixed 105 mm stainless penetration probe on 1.5 m cable — confirm reach and penetration depth.
Alarm use — Programmable high/low audible and visual alarms; no analog process output on this indicator.
Ingress — IP65 on meter and sensor — suitable for washdown-adjacent areas within that rating.
Mounting — Choose magnetic back, foot stand, or wall mount for the install location.

Common mistakes

Expecting a 4–20 mA or Modbus process output — TM26 is an LCD indicator with alarms only.
Ordering as a dewpoint calibrator — this SKU is an NSF temperature indicator.
Assuming a pocket integral stem like 39240 — TM26 uses a cabled 105 mm penetration probe.
Ignoring NSF / IP65 needs when the site SOP requires both for food monitoring.

When to RFQ / what to tell us

Media and expected temperature band; confirm NSF and IP65 are required.
Probe reach (1.5 m cable / 105 mm stem) and preferred mount (magnetic / stand / wall).
Quantity, ship-to, and spare CR2032 needs if known.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	43422
Brand	Extech
Model	TM26
Product type	temperature_indicator
Measuring range	−40 to 200 °C (−40 to 392 °F) RTD penetration probe
Accuracy	±1 °C / ±1.8 °F basic (FLIR page: banded 0.5/1.0/2.0 °C by range); datasheet cites ±1.8 °F/1 °C basic
Resolution	0.1 °C/°F
Sensor type	4.1 in (105 mm) stainless-steel penetration probe with 5 ft (1.5 m) cable
Output signal	LCD indicator with programmable high/low audible and visual alarms (no analog process output)
Ingress protection	IP65 (meter and sensor)
Supply voltage	1 × CR2032 (3 V) battery
Dimensions	3.4 × 2.2 × 1.2 in (86 × 57 × 30 mm)
Weight	3.2 oz (90 g)
Mounting	Magnetic back, removable foot stand, or wall mount
Approvals	NSF; CE
Notes	Specs from FLIR/Extech TM26 datasheet (flir.netx asset 52066) + flir.com/products/tm26. Standalone UM asset not resolved in clean harvest.

Documents

Extech / FLIR TM26 datasheet (PDF)

FAQ

Q: Does TM26 output 4–20 mA? A: No — it is an LCD temperature indicator with programmable high/low audible and visual alarms only.

Q: NSF and IP rating? A: NSF and CE marked; meter and sensor are IP65 per OEM datasheet.

Q: What should I send for a quote? A: Temperature band, mount preference, quantity, ship-to. Compatible with systems using Extech TM26 — we do not claim authorized-dealer status.