Temperature probes

Fieldpiece Dual type K thermometer, T1, T2 and T1−T2

A two-channel delta-T instrument with its own beaded probes, and the only thing on this shelf you can calibrate.

Fieldpiece ST4 dual temperature meter with rubber boot and two thermocouples

Fieldpiece Dual type K thermometer, T1, T2 and T1−T2

A two-channel delta-T instrument with its own beaded probes, and the only thing on this shelf you can calibrate.

Type and plug fit: TWO type K channels, with "wrap tab beaded thermocouples" included. Fieldpiece lists an optional ATWB1 wet bulb thermocouple as a further accessory. An LED indicates a DISENGAGED PROBE — a plug that has worked loose — which is the only answer on this shelf to the problem this shelf's introduction raises about plugs, approached from the instrument end rather than the probe end
Probe style: WRAP-TAB BEADED, supplied. A bead is the fast-response style this shelf's introduction assigns to air, and a wrap tab lets the same bead be strapped to a pipe or a fin. Two of them, because the instrument exists to read a difference
Stated temperature range: −58 to 2000 °F (−50 to 1300 °C), stated. That is the widest span on this shelf by a long way — 1350 Celsius degrees, against 1100 for the Nxtop probe, 480 for the Klein 69142 and 100 for the Klein 69140 clamp. It is the instrument's range; what any given reading can reach depends on the thermocouple fitted, and the supplied beads are not 1300 °C (2372 °F) parts
Stated accuracy: NOT PUBLISHED. What is published instead is more unusual: TWO FRONT-FACE CALIBRATION POTS, one per channel. This is the only instrument on this shelf that can be adjusted by its owner, which is a different proposition from a stated tolerance — it means the reading can be matched to a reference rather than trusted as supplied
Functions: Reads T1, T2 or T1−T2, with the difference "in big numbers on the LCD". Min/Max and Hold. Fieldpiece states "great temperature compensation for fast changing environments", which is the figure a two-channel meter lives or dies by and is given here as a claim rather than a number
Cable length: Not stated for the supplied thermocouples. No length is published for either of the two thermocouples it ships — the one figure of the hub’s five that this page omits
Construction and safety: A rugged rubber boot, and a clear-front case with the ANC6 magnetic hanger included. A magnetic hanger on an HVAC job is not a nicety: it puts the meter on the side of the unit at eye level while both hands are in the cabinet
Also stated: 386 grams — five times the 78 g (2.8 oz) of the Nxtop, the next heaviest probe here. At $119 it is also the most expensive, and it is a different kind of purchase from the rest of the shelf: four of these five products are probes for a meter you already own, and this one is the meter
Amazon reference: B000OLCD9Q
EAN: 0735090638122

Two channels and a direct T1−T2 reading
Two calibration pots — the only adjustable thing here
No accuracy figure at a hundred and nineteen dollars

Best for: Finding a temperature split across a coil, where the difference between two readings is the measurement and not either reading alone

≈ $119

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Specifications

Type and plug fit: TWO type K channels, with "wrap tab beaded thermocouples" included. Fieldpiece lists an optional ATWB1 wet bulb thermocouple as a further accessory. An LED indicates a DISENGAGED PROBE — a plug that has worked loose — which is the only answer on this shelf to the problem this shelf's introduction raises about plugs, approached from the instrument end rather than the probe end
Probe style: WRAP-TAB BEADED, supplied. A bead is the fast-response style this shelf's introduction assigns to air, and a wrap tab lets the same bead be strapped to a pipe or a fin. Two of them, because the instrument exists to read a difference
Stated temperature range: −58 to 2000 °F (−50 to 1300 °C), stated. That is the widest span on this shelf by a long way — 1350 Celsius degrees, against 1100 for the Nxtop probe, 480 for the Klein 69142 and 100 for the Klein 69140 clamp. It is the instrument's range; what any given reading can reach depends on the thermocouple fitted, and the supplied beads are not 1300 °C (2372 °F) parts
Stated accuracy: NOT PUBLISHED. What is published instead is more unusual: TWO FRONT-FACE CALIBRATION POTS, one per channel. This is the only instrument on this shelf that can be adjusted by its owner, which is a different proposition from a stated tolerance — it means the reading can be matched to a reference rather than trusted as supplied
Functions: Reads T1, T2 or T1−T2, with the difference "in big numbers on the LCD". Min/Max and Hold. Fieldpiece states "great temperature compensation for fast changing environments", which is the figure a two-channel meter lives or dies by and is given here as a claim rather than a number
Cable length: Not stated for the supplied thermocouples. No length is published for either of the two thermocouples it ships — the one figure of the hub’s five that this page omits
Construction and safety: A rugged rubber boot, and a clear-front case with the ANC6 magnetic hanger included. A magnetic hanger on an HVAC job is not a nicety: it puts the meter on the side of the unit at eye level while both hands are in the cabinet
Also stated: 386 grams — five times the 78 g (2.8 oz) of the Nxtop, the next heaviest probe here. At $119 it is also the most expensive, and it is a different kind of purchase from the rest of the shelf: four of these five products are probes for a meter you already own, and this one is the meter
Amazon reference: B000OLCD9Q
EAN: 0735090638122

What the maker puts in writing

“Dual Temperature Meter, -58 to 2000F(-50 to 1300C)”
“measures two temperatures simultaneously using the included K-Type, wrap tab beaded thermocouples”
“Read T1, T2, or T1-T2” · displayed “in big numbers on the LCD screen”
“Features two front face calibration pots”
“LED indicates disengaged probe”
“Great temperature compensation for fast changing environments”
“clear front case with Magnetic hanger model ANC6” · rubber boot · 386 g (13.6 oz) · $119

NO accuracy figure. NO lead length. The compensation claim carries no number.

It exists to read a difference

Which is why two channels matter more than either channel.

A split taken one probe at a time is two measurements separated by however long it took you to move the probe.

In that gap a compressor cycles and a fan stages up, and the difference you calculate is one that never existed.

T1 and T2 read at the same instant, and T1−T2 on the display.

The subtraction also cancels whatever offset the two channels share — which is why a delta read this way is better than either absolute figure.

The only thing on this shelf you can calibrate

Two front-face pots, one per channel.

Nothing else here can be adjusted at all: a probe has a tolerance or it has nothing.

The real use is not making the absolute numbers right. It is matching the two channels to EACH OTHER, which an ice bath does for both at once, and which is exactly what a delta-T instrument needs most.

An LED for a loose plug

Approached from the instrument end, this is the shelf’s own opening problem.

“The miniature flat plug that connects it is where fit fails.”

Four products on this shelf answer that with an adapter, a connector spacing, or nothing.

This one watches for it and lights up.

Two thousand Fahrenheit is the meter’s number

Not the beads’.

The listing states the instrument’s range and separately describes the included wrap-tab beaded thermocouples, which are HVAC parts with plastic-insulated leads.

Reaching 1300 °C (2372 °F) means fitting a thermocouple built for it — the sheathed 1100 °C (2012 °F) rod on this shelf, for instance — and checking the plug fits.

Read the top of the range as what the electronics will display.

And the thing it never quantifies

“Great temperature compensation for fast changing environments.”

Cold-junction compensation is the whole art of a thermocouple instrument: the reading is a voltage difference between the hot junction and the meter’s own terminals, so when the meter itself warms up or cools down the figure moves.

A two-channel meter in a plant room gets exactly that treatment.

It is the number this instrument should publish, and it is a claim instead.

Availability

On sale at around 119 € on the American Amazon store at the time of checking.

Prices and availability are what Keepa reported on the date this page was updated; both move.

Prices quoted in this text were read on 8 October 2026. The live price is at the top of the page.

What gets asked here

Why buy a two-channel meter instead of two readings with one probe?

Because a temperature split taken one probe at a time is two measurements separated by however long it took you to move. On a coil, a duct or a heat exchanger the conditions drift in that gap — a compressor cycles, a fan stages up — and the difference you calculate is not a difference that ever existed. Two channels read simultaneously and the instrument shows T1−T2 directly. It also cancels most of the error: whatever offset both channels share disappears from the subtraction, which is why a delta read this way is better than either absolute figure.

What do the calibration pots do, and should I touch them?

They let you adjust each channel so its reading matches a reference — an ice bath at 0 °C (32 °F), boiling water at your altitude, or a calibrated instrument. Nothing else on this shelf can be adjusted at all. Whether to touch them depends on having something to adjust against: turning a pot to make a number look right is worse than leaving it alone. The genuine use is matching the two channels to EACH OTHER, which is what a delta-T instrument needs most and which an ice bath will do for both at once.

Does it really read to 2000 °F?

The instrument does. The supplied beaded thermocouples do not, and the listing does not claim they do — it states the meter's range and separately describes the included probes. A beaded wrap-tab thermocouple with plastic-insulated leads is an HVAC part, good for a few hundred degrees. Reaching 1300 °C (2372 °F) means fitting a thermocouple built for it, such as the sheathed 1100 °C (2012 °F) rod elsewhere on this shelf, and checking the plug fits. Read the top of this range as what the electronics will display, not as what arrives in the box.

More temperature probes

Klein Tools Type K pipe clamp, −20 to 100 °C (-4 to 212 °F)

The genuine Klein pipe clamp — and the narrowest temperature range on this shelf, at the highest price of the two clamps.

Type and plug fit
Type K, stated. "Works with any digital multimeter or clamp meter that measures temperature", and Klein adds that its K-type accessories work with all Klein multimeters and clamp meters that measure temperature "as well as any other brand with meters that measure temperature". The banana plug adapter is NOT in the box: it is Cat. No. 69146, sold separately — which matters because this shelf's introduction says the plug is where fit fails
Probe style
A PIPE CLAMP, which is a fourth style this shelf's introduction does not name. It lists a bead for air, a flat pad for surfaces and a sheathed rod for immersion; a spring clamp that closes round a pipe reads the outside wall of a line you cannot immerse anything in. It is the dominant style in the American relevé for this shelf, because that is how a refrigeration circuit is diagnosed
Stated temperature range
−4 to 212 °F (−20 to 100 °C), stated. That is the NARROWEST range on this shelf: the published Taiss states −40 to 350 °C (-40 to 662 °F), the Nxtop 0 to 1100 °C (32 to 2012 °F), the Klein 69142 beside it 0 to 480 °C (32 to 896 °F), and the ZIBOO clamp that borrows this part number claims −40 to 200 °C (-40 to 392 °F). One hundred degrees Celsius is the top of it, which covers a heating flow and stops below a hot gas line
Stated accuracy
±2%, stated — and then the sentence that makes it honest: "Thermocouple accuracy is dependent on the accuracy of the meter being used." Two probes on this shelf publish a figure at all — this clamp and the ZIBOO — and both add that caveat. It is the right way to put it: a thermocouple generates a voltage, and what turns that voltage into a number is the instrument
Cable length
40 inches, 102 cm, flexible. The ZIBOO clamp states 39.78 inches for the same 102 cm (40.2 in), which is the same lead described to two decimal places. The published Taiss five-pack gives 3 m (10 ft), three times either clamp
Clamp capacity
Pipes from 1/4 to 1-3/8 inch diameter. The ZIBOO clamp claims 1/4 to 1 1/2 inch — an eighth of an inch more. Both listings then add "up to 35 cm (13.8 in)", which is not a pipe diameter at all and appears on both pages
Heat resistance
Not stated separately from the measuring range. Klein positions this as the accessory that "extend[s] working temperature ranges for Klein's HVAC Digital Multimeters and Clamp Meters", and names the rest of the family: high temperature thermocouple wire, temperature probe and banana plug adapter
Amazon reference
B07B2PPBRB
EAN
0092644690679
- Type K, so it reads correctly on any type K meter
- A clamp, which is what a pipe actually needs
- A hundred degrees Celsius is the narrowest ceiling here
Best for: HVAC pipe temperatures on small-bore copper, read through a Klein or any other meter with a temperature function

≈ $27
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Klein Tools High-temperature type K thermocouple, 0 to 480 °C (32 to 896 °F)

Klein's high-temperature thermocouple — 480 °C (896 °F), a coiled lead, and no stated accuracy or probe style.

Type and plug fit
Type K, stated, and the ADAPTER IS INCLUDED — "with Adapter" is in the product title. That puts it with the ZIBOO clamp and against the Klein 69140, where the adapter is a separate part number. "Works with any digital multimeter or clamp meter that measures temperature"
Stated temperature range
32 to 896 °F (0 to 480 °C), stated. Nearly FIVE TIMES the ceiling of Klein's own 69140 pipe clamp, which stops at 100 °C (212 °F) — and Klein says so directly: these accessories "extend working temperature ranges for Klein's HVAC Digital Multimeters and Clamp Meters". It does not go below freezing, which the two pipe clamps on this shelf both do
Probe style
NOT STATED. This shelf's introduction makes probe style the thing you choose by the job — a bead for air, a flat pad for surfaces, a sheathed rod for immersion — and this listing says only "High Temperature Thermocouple". There is no bead, no pad, no sheath and no tip dimension anywhere on the page, which is the one specification a buyer needs to know whether it will sit on a flue or in it
Stated accuracy
NOT PUBLISHED. The listing gives only the caveat without the figure: "Accuracy of the thermocouple is dependent on the accuracy of the meter being used." Both pipe clamps on this shelf state ±2% alongside that sentence; this one states the sentence alone, at the highest price of the three Klein parts
Cable length
A COILED lead, 3 feet — the only coiled lead on this shelf, and shorter than either pipe clamp’s meter. Coiled matters on a hot job: a straight lead draped across a flue collects heat along its length, while a coil keeps the cable off the work and pulls back out of the way
Heat resistance
Implied by the 480 °C (896 °F) measuring range and not stated separately for the lead. Klein lists "High Temperature Thermocouple Wire" as a DIFFERENT accessory in the same family, which suggests the wire on this part is not itself the high-temperature item
Also stated
11 grams, the lightest probe weight published on this shelf. Klein names the rest of the K-type family on this page — temperature pipe clamp, temperature probe, high temperature thermocouple wire and banana plug adapter — which is the clearest accessory map any maker on this shelf publishes
Amazon reference
B07B2TW23J
EAN
0092644690686
- Four hundred and eighty degrees, five times Klein's own clamp
- The adapter is in the box
- No accuracy figure at all, at thirty dollars
Best for: Flue gases, hot gas lines and anything above the 100 °C (212 °F) ceiling of Klein's own pipe clamp

≈ $30
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Leopacat Type K thermometer with probe

A probe with its own readout: a handheld type K thermometer for measuring temperature without occupying a multimeter.

Amazon reference
B0CQJYQ1ZX (identical on 6 markets)
EAN
7362571391967
Thermocouple type
Type K
Supplied
handheld thermometer with probe
Functions
wide operating range
- Comes with its own display, so it does not tie up a multimeter for the duration of a measurement
- Type K, so any standard probe fits it
- No accuracy figure published
Best for: Leaving on a monitored point while the multimeter goes on doing something else.

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Elsewhere in the spares drawer

Eiranoly Silicone lead pair, CAT II 1000 V, 103 cm (40.6 in)

The cheapest set on this shelf, the only one that publishes a temperature range — and the only CAT II leads with a 1000 V figure beside it.

Stated rating
CAT II 1000 V, 20 A, stated. That is the point to read carefully, because the buying tip on the multimeter shelf of this site puts it exactly: the category and the voltage are one specification, not two, and the higher-looking number is not the safer tool. CAT II 1000 V is a LOWER category than the CAT III 1000 V of the PUKAIBUL at $9.99 and the CAT III 1000 V / CAT IV 600 V of the three Klein sets — and fitting these to a CAT III meter gives you, per this shelf's introduction, a CAT II pairing
Insulation
DOUBLE-INSULATED SILICONE, with the only OPERATING TEMPERATURE RANGE published anywhere on this shelf: −58 °F to +392 °F, −50 °C to +200 °C (392 °F). This shelf's introduction compares silicone against PVC for cold flexibility and no other listing here puts a number on it — the Fluke says "remain flexible in cold temperatures" without one
Length
40.5 inches, 103 cm, stated. Mid-length for this shelf: shorter than the PUKAIBUL's 125 cm (49.2 in) and the published PeakTech's 120 cm (47.2 in), a centimeter under the Klein 69410's 104 cm (40.9 in), longer than the 91 cm (35.8 in) of the two other Klein sets
Plugs and tips
Gold-plated ULTRA-SHARP probes, stated to pierce wire insulation or reach a solder joint on a dense board, and "a universal 4.2mm (0.17 in)(0.16inch) banana plug". Two figures that do not agree: 0.16 inch is 4.06 mm (0.16 in), and the standard every other listing on this shelf names is 4 mm (0.16 in). A plug genuinely 4.2 mm (0.17 in) across would be a tight fit in a 4 mm (0.16 in) socket; the likeliest reading is that this is a standard 4 mm (0.16 in) plug described loosely
Supplied
One red lead, one black lead, one red clip, one black clip and FOUR probe safety covers — two more than needed, and the listing explains why: "customers have reported that they are easily lost, so we've included 2 extra probe covers". That is the only listing on this shelf that changed its contents because of what buyers said. 77 grams, the lightest set on this shelf
Also stated
Compatible with "almost all mainstream brands of multimeters and clamp meters such as Fluke, AstroAI, INNOVA, Klein Tools". Stated to be tangle-resistant and stretch-resistant. At $6.79 it is the cheapest item on this shelf
Amazon reference
B0FC9K5VTY
EAN
0607601283025
- Minus fifty to two hundred Celsius, the only range published here
- Silicone, double insulated, named
- CAT II, where the rest of the rated sets are CAT III or IV
Best for: A second pair for the drawer, on circuits where CAT II is the right category and the cold matters

≈ $7
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AUTOOL Test lead kit, 68 pieces

A 68-piece kit in silicone rather than PVC — the insulation that stays flexible hot and cold, and the reason a good lead feels different in the hand.

Amazon reference
B0CXDTL7QH (identical on 6 markets)
EAN
6972697788988
Supplied
68 pieces
Insulation test
silicone insulation
Construction and safety
universal instrument fit
- Sixty-eight pieces, covering essentially every connector a bench needs
- Silicone insulation, stated as flexible and durable — the better material for test leads
- No measurement category or voltage published
Best for: A bench where the measurement is different every time and the connector is never the one you have.

≈ $62
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Fluke TwistGuard leads with wear indication

The only leads here that show you their own wear — and, at $33.83, one of two sets that never name a category.

Stated rating
NO CATEGORY NAMED. The listing says the TwistGuard shroud "meets the highest electrical safety requirements" and never writes CAT II, III or IV, nor a voltage. This shelf's tag line is "the leads carry the same CAT rating as the meter, or they do not", and at $33.83 it is among the most expensive sets here — the Bionso at $29.99 also names no category. Three Klein sets here publish CAT III 1000 V and CAT IV 600 V in a bullet
Insulation
DOUBLE INSULATED SILICONE, and the second layer does a job: "WearGuard lead wire wear indication. Each test lead is covered by two layers of silicone insulation; inner contrasting color is exposed when the leads are nicked, scuffed, or otherwise damaged and in need of replacement." Stated to withstand high temperatures and remain flexible in cold, with no figures. Extra-heavy-duty strain relief at both the probe end and the plug end
Plugs and tips
2 mm (0.08 in) probe tips with a PATENTED TWISTGUARD EXTENDABLE TIP SHROUD: twist the shroud and the amount of exposed metal changes, so the same probe suits a shrouded terminal and an open test point. Removable 4 mm (0.16 in) LANTERN TIPS thread on. The input plugs are "standard 4 mm (0.16 in) SHROUDED banana plugs" — the only listing on this shelf that calls its plugs shrouded, which this shelf's introduction names among its five comparisons
Durability
TESTED BEYOND 30,000 BENDS WITHOUT FAILURE, stated. It is the only durability figure published on this shelf, and it is the right figure for the part this shelf's introduction calls "the part of a meter that gets stood on". The strain relief is called out separately at both ends, which is where a lead actually dies
Length
NOT PUBLISHED. Every other set here that states a length gives one — 91 cm (35.8 in), 103 cm (40.6 in), 104 cm (40.9 in), 109 cm (42.9 in), 125 cm (49.2 in), 1 m (3 ft) — and this one does not, on a page that otherwise publishes more than any of them
Also stated
120 grams. Fluke writes that the TL175 "are the only test leads as tough as your meter", which is a claim about the pairing rather than a specification. The whole listing is built on two named technologies, a bend count and a shroud, and omits the category and the length
Amazon reference
B005CTI592
EAN
0021111461641
- Two silicone layers, the inner one a wear warning
- An adjustable tip shroud — no other lead here has one
- No measurement category anywhere on the page
Best for: Anyone who follows this shelf's buying tip literally, because these leads do the inspection for you

≈ $34
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All temperature probes

Fieldpiece Dual type K thermometer, T1, T2 and T1−T2

Specifications

What the maker puts in writing

It exists to read a difference

The only thing on this shelf you can calibrate

An LED for a loose plug

Two thousand Fahrenheit is the meter’s number

And the thing it never quantifies

Availability

What gets asked here

More temperature probes

Klein Tools Type K pipe clamp, −20 to 100 °C (-4 to 212 °F)

Klein Tools High-temperature type K thermocouple, 0 to 480 °C (32 to 896 °F)

Leopacat Type K thermometer with probe

Elsewhere in the spares drawer

Eiranoly Silicone lead pair, CAT II 1000 V, 103 cm (40.6 in)

AUTOOL Test lead kit, 68 pieces

Fluke TwistGuard leads with wear indication