Temperature probes

Nxtop Sheathed type K probe, 1100 °C (2012 °F), 3 × 200 mm (0.12 × 7.87 in)

The cheapest probe on this shelf, the hottest, and the only one that publishes a dimension for its plug.

Nxtop WRNK-187 type K thermocouple probe with yellow miniature connector

Nxtop Sheathed type K probe, 1100 °C (2012 °F), 3 × 200 mm (0.12 × 7.87 in)

The cheapest probe on this shelf, the hottest, and the only one that publishes a dimension for its plug.

Type and plug fit: Type K with a MINIATURE K-TYPE CONNECTOR, and the fork terminal spacing is published: 5 mm (0.20 in), 0.197 inch. It is the ONLY probe on this shelf that gives a dimension for its plug, and this shelf's introduction says in so many words that "the miniature flat plug that connects it is where fit fails". A nine-dollar probe answers the shelf's stated failure point, and the twenty-seven and thirty-dollar Kleins do not
Probe style: A SHEATHED ROD, 3 mm (0.12 in) diameter by 200 mm (7.87 in) long — the immersion style this shelf's introduction names. Total length 29.5 cm (11.6 in) with the cable gland, so roughly 9 cm (3.5 in) of that is body rather than probe. It is the only product on this shelf whose probe geometry is fully dimensioned
Stated temperature range: 0 to 1100 °C (32 to 2012 °F), stated. That is the HIGHEST range published by any probe on this shelf: the Klein 69142 reaches 480 °C (896 °F), the published Taiss 350 °C (662 °F), the ZIBOO clamp 200 °C (392 °F) and the Klein 69140 clamp 100 °C (212 °F). Only the Fieldpiece ST4 meter claims more, at 1300 °C (2372 °F), and that is the instrument's range rather than a probe's. Like the Klein 69142 it does not go below zero
Cable length: 30 cm (11.8 in), 12 inches, stated "not stretched" — the SHORTEST on this shelf by a wide margin. The two pipe clamps give 102 cm (40.2 in), the Klein 69142 three feet, the published Taiss 3 m (10 ft). Thirty centimeters puts your hand about a foot from whatever is at 1100 degrees, which is the real limit of this probe and has nothing to do with its sensor
Stated accuracy: NOT PUBLISHED, and no tolerance class is named either. Only the two pipe clamps on this shelf publish a percentage at all; this one publishes nothing. At $8.99 that is the trade being offered, and the sentence both Klein clamps print applies here too whether or not it is written: what turns the junction voltage into a number is your meter
Heat resistance: Implied by the 1100 °C (2012 °F) range for the sheath, and unstated for the cable. The listing describes the materials only as "Electronic Parts, Plastic" and the color as yellow, which is the standard color coding for type K in American practice. A plastic-insulated 30 cm (11.8 in) lead is what sets the working distance, not the stainless rod
Also stated: 78 grams, against 11 g (0.4 oz) for the Klein 69142. The listing is written as a parts-catalog entry rather than marketing — product name, model, type, color, material, range, weight, fork spacing, probe dimensions, total length, cable length, package contents — and that is why it publishes more dimensions than anything else on this shelf
Amazon reference: B07DNGWLFS
EAN: 0703064924915

Eleven hundred degrees for nine dollars
The only plug dimension published on this shelf — 5 mm (0.20 in)
Thirty centimeters of cable, at 1100 degrees

Best for: Kiln, furnace, forge and flue work, where 1100 °C (2012 °F) is the specification and a 30 cm (11.8 in) cable is enough

≈ $9

Check price on Amazon

Specifications

Type and plug fit: Type K with a MINIATURE K-TYPE CONNECTOR, and the fork terminal spacing is published: 5 mm (0.20 in), 0.197 inch. It is the ONLY probe on this shelf that gives a dimension for its plug, and this shelf's introduction says in so many words that "the miniature flat plug that connects it is where fit fails". A nine-dollar probe answers the shelf's stated failure point, and the twenty-seven and thirty-dollar Kleins do not
Probe style: A SHEATHED ROD, 3 mm (0.12 in) diameter by 200 mm (7.87 in) long — the immersion style this shelf's introduction names. Total length 29.5 cm (11.6 in) with the cable gland, so roughly 9 cm (3.5 in) of that is body rather than probe. It is the only product on this shelf whose probe geometry is fully dimensioned
Stated temperature range: 0 to 1100 °C (32 to 2012 °F), stated. That is the HIGHEST range published by any probe on this shelf: the Klein 69142 reaches 480 °C (896 °F), the published Taiss 350 °C (662 °F), the ZIBOO clamp 200 °C (392 °F) and the Klein 69140 clamp 100 °C (212 °F). Only the Fieldpiece ST4 meter claims more, at 1300 °C (2372 °F), and that is the instrument's range rather than a probe's. Like the Klein 69142 it does not go below zero
Cable length: 30 cm (11.8 in), 12 inches, stated "not stretched" — the SHORTEST on this shelf by a wide margin. The two pipe clamps give 102 cm (40.2 in), the Klein 69142 three feet, the published Taiss 3 m (10 ft). Thirty centimeters puts your hand about a foot from whatever is at 1100 degrees, which is the real limit of this probe and has nothing to do with its sensor
Stated accuracy: NOT PUBLISHED, and no tolerance class is named either. Only the two pipe clamps on this shelf publish a percentage at all; this one publishes nothing. At $8.99 that is the trade being offered, and the sentence both Klein clamps print applies here too whether or not it is written: what turns the junction voltage into a number is your meter
Heat resistance: Implied by the 1100 °C (2012 °F) range for the sheath, and unstated for the cable. The listing describes the materials only as "Electronic Parts, Plastic" and the color as yellow, which is the standard color coding for type K in American practice. A plastic-insulated 30 cm (11.8 in) lead is what sets the working distance, not the stainless rod
Also stated: 78 grams, against 11 g (0.4 oz) for the Klein 69142. The listing is written as a parts-catalog entry rather than marketing — product name, model, type, color, material, range, weight, fork spacing, probe dimensions, total length, cable length, package contents — and that is why it publishes more dimensions than anything else on this shelf
Amazon reference: B07DNGWLFS
EAN: 0703064924915

What the maker puts in writing

“Type 0-1100C Thermocouple Probe Temperature Sensor 3x200mm (0.12 × 7.87 in) WRNK-187”
“Model : WRNK-187; Type : K Type”
“Temperature Range : 0-1100C”
“Fork Terminal Spacing : 5mm (0.20 in)/ 0.197”; Probe Head Size : 3 x 200mm (0.12 × 7.87 in)/ 0.12” x 8 “(Dia*L); Probe Total Length : 29.5cm (11.6 in)/11.6”; Cable Length : 30cm (11.8 in)/ 12”(Not Stretched)”
“Miniature K-Type connector”
“Main Color : Yellow” · 78 g (2.8 oz) · $8.99

NO accuracy figure. NO tolerance class.

The only probe here that dimensions its plug

Five millimeters. Nought point one nine seven of an inch. Fork terminal spacing.

“The miniature flat plug that connects it is where fit fails, and polarity is set by the plug rather than by color convention alone.”

That sentence sits at the head of this shelf, and a nine-dollar parts-catalog listing is the only one of five that answers it.

The $26.98 Klein clamp does not. The $29.99 Klein thermocouple does not. The ZIBOO does not.

Eleven hundred degrees

The highest range published by any PROBE on this shelf.

Klein 69142: 480 °C (896 °F). Published Taiss: 350. ZIBOO clamp: 200. Klein 69140 clamp: 100.

The Fieldpiece ST4 meter claims 1300 °C (2372 °F), but that is an instrument’s range, not a sensor’s.

A type K junction is specified well above 1100 and the metals do not care what the probe cost. What money buys is the tolerance class, the sheath, and how many thermal cycles it survives — none of which this page states.

And thirty centimeters of cable

Which is the real limit of this probe, and it has nothing to do with the sensor.

Twelve inches, “not stretched”.

That puts your hand about a foot from something at 1100 degrees.

For a kiln with a port, or a forge where the probe goes in and the meter stays on the bench, it is right — this is the consumable end of a longer circuit.

Extend it with type K extension wire. Never with copper: a dissimilar-metal join is a second junction with a voltage of its own.

A sheathed rod, fully dimensioned

Three millimeters by two hundred. The immersion style the introduction names.

Total length 29.5 cm (11.6 in), so about 9 cm (3.5 in) of that is gland and body rather than probe.

It is the only product on this shelf whose probe geometry is given at all — the Klein 69142 publishes no shape, no tip diameter and no sheath length.

Written as a parts entry, which is why it says more

Product name. Model. Type. Color. Material. Range. Weight. Fork spacing. Probe head size. Total length. Cable length. Package contents.

No adjectives. No “dependable” anything.

Eleven specifications and no claims — and the only two numbers missing are the accuracy and the tolerance class.

Availability

On sale at around 9 € 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

Is thirty centimeters of cable enough at 1100 degrees?

That is the question to settle before the sensor specification, and often the answer is no. Thirty centimeters puts your hand and your meter about a foot from the work. For a kiln with a thermocouple port, a forge where the probe goes in and the meter sits on the bench, or any application where the lead is extended with type K compensating cable, it is fine — the probe is the consumable end of a longer circuit. For taking a reading by hand off something glowing, it is not. Extend it with type K extension wire, never with copper: a dissimilar-metal join makes a second junction and a reading of its own.

Why does the plug dimension matter so much?

Because this shelf's introduction says that is where fit fails, and this is the only listing on this shelf that answers it. A miniature type K plug has two flat blades at a standard spacing — 5 mm (0.20 in) here, stated — and the polarity is set by the blade widths rather than by color alone. Meters with a dedicated miniature thermocouple socket take it directly. Meters that read temperature through 4 mm (0.16 in) banana sockets need an adapter, which this probe does not include and the Klein 69142 does. Check which socket your meter has.

Can a nine-dollar probe really read to 1100 °C (2012 °F)?

The junction can: type K is specified well above that and the metals do not care what the probe cost. What varies with price is the tolerance class, the quality of the sheath, how long it survives repeated cycling, and whether the stated figure is a continuous rating or a one-off maximum — none of which this listing states. So treat 1100 °C (2012 °F) as the sensor's capability rather than a service life. For intermittent kiln and forge readings that is usually the right purchase. For a probe left in a furnace, buy one with a published tolerance class.

More temperature probes

Proster Two-channel thermocouple thermometer

The instrument that measures a difference rather than a temperature: two channels, with T1−T2 displayed directly instead of subtracted by hand.

Amazon reference
B071RNW2C6 (identical on 6 markets)
EAN
0711583415319
Channels
Two channels · T1 / T2 / T1−T2
Also stated
J, K and T types
Functions
MAX, MIN, AVG
- Two channels with a direct T1−T2 display — the measurement most temperature work actually needs
- Accepts J, K and T type probes across very wide stated ranges
- No accuracy figure published
Best for: Flow and return, inlet and outlet, before and after — anything where the answer is a difference.

Check price on Amazon
Taiss Type K thermocouple probes, five-pack

Five type K probes on 3 m (10 ft) leads — the pack to buy when several points have to be monitored at once, or when probes keep getting damaged.

Amazon reference
B07R8T6V46 (identical on 5 markets)
EAN
0789659567606
Thermocouple type
Type K
Supplied
five probes
Marking medium
3 m (10 ft) lead
Stated temperature range
−40 to 350 °C (-40 to 662 °F) stated
- Five probes in one pack, so several points can be instrumented at once
- Three-meter leads, long enough to keep the instrument away from the heat
- A 350 °C (662 °F) ceiling, far below what type K itself can do
Best for: Monitoring several points at once — a flow and a return, an inlet and an outlet.

Search Amazon for this model
ZIBOO Type K pipe clamp, −40 to 200 °C (-40 to 392 °F), with adapter

A clamp that carries Klein's part number in its own title and claims double the original's range for half the price.

Type and plug fit
Type K, stated, and the BANANA PLUG ADAPTER IS INCLUDED — which is the genuine advantage over the Klein 69140, where the adapter is Cat. No. 69146 and sold separately. ZIBOO then notes that the adapter is "also sold separately (Cat. No. 69146)", quoting Klein's catalog number for a part it has put in its own box
Probe style
A PIPE CLAMP, closing round pipes from 1/4 to 1 1/2 inch — an eighth of an inch more than the Klein 69140 claims. Like that clamp, it is a style this shelf's introduction does not name among its bead, pad and rod
Stated temperature range
−40 to 392 °F (−40 to 200 °C), claimed. The Klein 69140, whose part number is in this product's title, states −4 to 212 °F (−20 to 100 °C). That is NEARLY TWICE the span, and twice the ceiling, on a copy that costs $14.99 against $26.98. Nothing on either page explains the difference, and a clamp reading 200 °C (392 °F) would reach a hot gas discharge line the original cannot
Stated accuracy
±2%, the same figure the Klein 69140 gives, followed by the same sentence: "Thermocouple accuracy is dependent on the accuracy of the meter being used." The wording of this listing follows the Klein listing bullet for bullet — wide temperature range, versatile pipe clamp, flexible lead, universal compatibility, dependable accuracy — in the same order
Cable length
39.78 inches, 102 cm, flexible. The Klein 69140 states 40 inches for the same 102 cm (40.2 in). Thirty-nine point seven eight inches is 101.04 cm (39.8 in), so the figure has been converted from the metric and given to two decimals rather than measured
Clamp capacity
Pipes 1/4 to 1 1/2 inch, then "(up to 35 cm (13.8 in))" — the same parenthesis that appears on the Klein page, where it is equally wrong. One and a half inches is 38 Millimeters. Thirty-five centimeters is not a pipe this clamp or any other on this shelf would close around
Also stated
The reference field reads 69028+69146 — two Klein Tools catalog numbers concatenated, 69146 being the banana adapter. The title opens "ZIBOO 69140 K-Type Thermometer", and 69140 is the Klein part number of the clamp sitting next to it in this same relevé. The brand on the box is ZIBOO; the part numbers on the listing are all somebody else's
Amazon reference
B0DKFKSTNG
EAN
0736483405789
- The banana adapter is in the box
- Minus forty to two hundred degrees claimed, twice the Klein
- It sells under another maker's part number
Best for: HVAC pipe work on a budget, where the adapter in the box and the wider claimed range are worth the unverified specification

≈ $15
Check price on Amazon

Elsewhere in the spares drawer

Klein Tools Heavy-duty clip leads, 18 AWG, 3 ft

A clip-only lead in 18 AWG — the one set here that tells you the size of the wire inside it.

Stated rating
CAT III 1000 V / CAT IV 600 V, stated. The same pairing as the two other Klein sets, and the three of them are the only CAT IV items on this shelf. This shelf's introduction explains the arithmetic: the rated pair is the lower of meter and leads
Insulation
18 AWG DOUBLE INSULATED WIRE, stated — and the gauge is what makes this listing unusual. No other product on this shelf publishes a wire gauge at all. What it does NOT say is the material: not silicone, not PVC, just double insulated, as on both other Klein sets
Plugs and tips
Banana plug at one end, HEAVY-DUTY ALLIGATOR CLIP at the other, right-angle at the plug. There is no probe tip: this is a clip-only lead, which is a different purchase from the 69410 beside it where the clips unscrew. No shrouding is mentioned
Length
3 feet, 91 cm — the shortest of the three Klein sets and the shortest stated lead on this shelf. Against the PUKAIBUL's 125 cm (49.2 in) and the published PeakTech's 120 cm (47.2 in), that is a third less reach
Stated application
INSULATION RESISTANCE TESTING, named in a bullet as "a perfect application for heavy-duty leads". That is a specific and sensible claim: an insulation test applies hundreds of volts between a conductor and earth for a minute at a time, which is a job for a clip that stays put rather than a probe held by hand
Supplied
One pair of universal right-angle leads with heavy-duty clips. The clips are not described as removable, which is the trade against the 69410: more clip, less versatility, same price to within two cents — $19.99 against $19.97
Amazon reference
B09YTDKDPQ
EAN
0092644693816
- Eighteen AWG published, alone on this shelf
- CAT III 1000 V and CAT IV 600 V
- Clips only — there is no probe tip
Best for: Insulation resistance testing and any reading you need to leave clipped on while you work

≈ $20
Check price on Amazon
Klein Tools Right-angle lead set, CAT III 1000 V

A plain rated pair — and the rating is the whole point, because the three European sets on this shelf publish none.

Stated rating
CATEGORY III 1000 V AND CATEGORY IV 600 V, stated in a bullet. This shelf's introduction is explicit about why that matters: "fitting unrated leads to a CAT III meter gives you a CAT III meter with unrated leads, and the manufacturer's rating for the pair is the lower of the two". The three European sets previously on this shelf publish no category at all; this is one of three sets here that reach CAT IV
Insulation
NOT NAMED. The listing says the leads are durable and says nothing about silicone or PVC — and this shelf's introduction makes that comparison one of its five: silicone stays flexible in the cold where PVC goes stiff and cracks. All three Klein sets share the omission, which is odd on a product whose own description stresses that it is designed by electricians for electricians
Plugs and tips
Right-angle, "standard banana-type inputs compatible with most multimeters and clamp meters". No tip length is published and the plugs are not described as shrouded. A right-angle plug is the detail that keeps a meter from being levered off a ledge by its own leads, and it is why these fit Klein's own lead storage compartments
Length
41 inches, 104 cm, stated. That sits below the published PeakTech's 120 cm (47.2 in) and well below the PUKAIBUL's 125 cm (49.2 in) on this shelf, and above the 3 ft (91 cm) of the two other Klein sets
Supplied
One pair of universal test leads and one set of REMOVABLE alligator clips. Removable is the useful word: the clips come off, so one purchase covers a probe measurement and a hands-free one. 91 grams
Also stated
The leads "are compatible with and fit the lead storage compartment on most Klein test and measurement products" — which is a specification about the METER rather than the lead, and the only one of its kind on this shelf. Klein also offers insulation resistance testing as an application of its heavy-duty sibling, the 69381
Amazon reference
B003U2GONM
EAN
0092644694103
- CAT III 1000 V and CAT IV 600 V, both published
- Removable alligator clips in the same purchase
- The insulation material is never named
Best for: Replacing the leads on any meter with banana sockets, where the meter is rated and the leads must not drag it down

≈ $20
Check price on Amazon
Klein Tools Meter accessory kit with 3 ft extenders

The only set here that extends: three feet of lead plus three feet of adapter, in a case you can wear.

Stated rating
CAT III 1000 V / CAT IV 600 V, stated — the same pairing as the two other Klein sets, and these three are the only CAT IV items on this shelf. The rating is given for the kit rather than itemized per part, which is worth noting on a set whose whole point is that the parts screw together
Length and reach
3-FOOT right-angle lantern-style leads PLUS 3-FOOT extension adapters — six feet, 183 cm, assembled. That is the longest reach on this shelf by a clear margin: the longest single lead here is the PUKAIBUL at 125 cm (49.2 in) and the published PeakTech is 120 cm (47.2 in). A meter hung on a magnet at the side of a cabinet while the probes reach the far end of a board is what this buys
Plugs and tips
Right-angle, LANTERN-STYLE tips, with removable threaded lead HEADS that connect either directly to the right-angle leads or to the extenders. A lantern tip is a sprung sleeve round the probe that grips a terminal rather than resting against it. No shrouding is described for the plugs
Insulation
NOT NAMED, as on both other Klein sets. This shelf's introduction compares silicone against PVC for cold flexibility, and this listing describes the case in more detail than the cable
Supplied
Two right-angle leads, two extenders, two removable lead heads, two screw-on alligator clips, and a carrying case with elastic straps for the heads, pockets for the leads and a BELT LOOP. Nine pieces and a case. 322 grams — the heaviest Klein item on this shelf
Also stated
Klein positions it as "an upgrade or replacement lead kit compatible with clamp meters, multimeters, or other test equipment with standard lead connections". The threaded heads are the mechanism that makes the kit modular: a clip, a probe head and an extender all take the same thread
Amazon reference
B0F167XRH8
EAN
0092644694837
- Six feet of reach, the longest on this shelf
- CAT III 1000 V and CAT IV 600 V
- Fifty dollars, the most expensive of the three Klein sets here
Best for: A meter that has to stay put while the probes go somewhere else — a cabinet at head height, a board across a room

≈ $50
Check price on Amazon

All temperature probes

Nxtop Sheathed type K probe, 1100 °C (2012 °F), 3 × 200 mm (0.12 × 7.87 in)

Specifications

What the maker puts in writing

The only probe here that dimensions its plug

Eleven hundred degrees

And thirty centimeters of cable

A sheathed rod, fully dimensioned

Written as a parts entry, which is why it says more

Availability

What gets asked here

More temperature probes

Proster Two-channel thermocouple thermometer

Taiss Type K thermocouple probes, five-pack

ZIBOO Type K pipe clamp, −40 to 200 °C (-40 to 392 °F), with adapter

Elsewhere in the spares drawer

Klein Tools Heavy-duty clip leads, 18 AWG, 3 ft

Klein Tools Right-angle lead set, CAT III 1000 V

Klein Tools Meter accessory kit with 3 ft extenders