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Measure temperature inside semi-solid materials with Anritsu BT Series needle temperature probes. Choose the needle diameter, length and tip shape to suit the measurement depth and material being tested.
Check temperatures below the surface of semi-solid materials using Anritsu BT Series needle temperature probes. The range offers different needle diameters, insertion lengths and tip shapes, allowing the probe to be selected around the sample and measurement depth.
Choose a fixed-needle assembly or a model with replaceable needles. For repeat measurements where spare sensing needles are needed, specify the compatible BTN replacement needle together with the probe.
Anritsu BT needle probes for internal temperature measurement in semi-solid materials.
Both Type E and Type K versions are available. Within each pair, the final digit identifies the tip: 1 = cut and 2 = sharp.
| Models | Needle diameter × length | Temperature range | Response | Replaceable needle |
|---|---|---|---|---|
| BT-11 / BT-12 | 0.9 × 15 mm | -200 to 210°C | 0.5 s | No |
| BT-21 / BT-22 | 1.5 × 30 mm | -200 to 300°C | 1.5 s | No |
| BT-31 / BT-32 | 1.6 × 30 mm | -200 to 300°C | 1.5 s | Yes |
| BT-41 / BT-42 | 1.6 × 40 mm | -200 to 300°C | 1.5 s | Yes |
| BT-51 / BT-52 | 1.6 × 50 mm | -200 to 300°C | 1.5 s | Yes |
| BT-61 / BT-62 | 1.6 × 60 mm | -200 to 300°C | 1.5 s | Yes |
| BT-71 / BT-72 | 1.6 × 70 mm | -200 to 300°C | 1.5 s | Yes |
| BT-81 / BT-82 | 5.0 × 75 mm | -200 to 500°C | 3 s | Yes |
| BT-91 / BT-92 | 5.0 × 100 mm | -200 to 500°C | 3 s | No |
Temperature limits: The listed range applies to the sensing portion. The handle, cable and connector have separate operating limits.
Select the needle dimensions, tip shape, thermocouple, cable and plug.
The following table retains the full Type E and Type K configurations previously listed on this page.
| Probe | Type E model | Type K model |
|---|---|---|
BT-31  |
BT-31E-TC1-ANP | BT-31K-TC1-ANP |
BT-92  |
BT-92E-TC1-ANP | BT-92K-TC1-ANP |
BT-72  |
BT-72E-TC1-ANP | BT-72K-TC1-ANP |
BT-22  |
BT-22E-TC1-ANP | BT-22K-TC1-ANP |
BT-82  |
BT-82E-TC1-ANP | BT-82K-TC1-ANP |
BT-11  |
BT-11E-TC1-ANP | BT-11K-TC1-ANP |
All Type K references from the existing listing are retained below. BT references identify probe configurations; BTN references identify replacement needles rather than complete probes.
| Needle size | Cut-tip probe | Sharp-tip probe | Cut-tip spare | Sharp-tip spare |
|---|---|---|---|---|
| 0.9 × 15 mm | BT-11K | BT-12K | Not replaceable | Not replaceable |
| 1.5 × 30 mm | BT-21K | BT-22K | Not replaceable | Not replaceable |
| 1.6 × 30 mm | BT-31K | BT-32K | BTN-31K | BTN-32K |
| 1.6 × 40 mm | BT-41K | BT-42K | BTN-41K | BTN-42K |
| 1.6 × 50 mm | BT-51K | BT-52K | BTN-51K | BTN-52K |
| 1.6 × 60 mm | BT-61K | BT-62K | BTN-61K | BTN-62K |
| 1.6 × 70 mm | BT-71K | BT-72K | BTN-71K | BTN-72K |
| 5.0 × 75 mm | BT-81K | BT-82K | BTN-81K | BTN-82K |
| 5.0 × 100 mm | BT-91K | BT-92K | Not replaceable | Not replaceable |
Supply configuration: The existing listing specifies replaceable-needle probe sets with a grip and five needles, and replacement needles in five-piece sets. Confirm pack contents and quantity when requesting a quotation.
Spare-needle matching: Provide the original BT model, thermocouple type and required tip shape. Type E spare needles are also available; confirm the exact BTN reference for your assembly.
| Temperature | BT-1 models | BT-2 to BT-7 models | BT-8 and BT-9 models |
|---|---|---|---|
| 0°C | ±2.5°C | ±2.5°C | ±2.5°C |
| 100°C | ±2.5°C | ±2.5°C | ±2.5°C |
| 200°C | ±2.5°C | ±2.5°C | ±2.5°C |
| 300°C | Outside range | ±2.5°C | ±2.5°C |
| 400°C | Outside range | Outside range | ±3.0°C |
| 500°C | Outside range | Outside range | ±3.8°C |
For temperatures from -40°C upward, within the selected model’s operating range, tolerance is the greater of ±2.5°C or ±0.75% of the absolute temperature in °C. For sub-zero applications, specify the working temperature and required uncertainty so the applicable tolerance can be confirmed.
Manufacturer tolerance is established under internal-temperature measurement conditions with sufficient heat capacity. Response times represent 99% response in boiling water or vapour; actual response depends on the sample and insertion conditions.
| Item | Details |
|---|---|
| Needle material | SUS304 stainless steel. |
| Grip materials | Phenolic resin, aluminium or nylon resin, depending on model. |
| BT-1 durability classification | C: more than six months under the manufacturer’s classification. |
| BT-2 to BT-8 durability classification | S: no general rating because use is application-specific. |
| BT-9 durability classification | B: more than one year under the manufacturer’s classification. |
| Repairability | Listed as non-repairable. Designated models allow needle replacement. |
Durability classifications are not service-life guarantees. Describe the sample hardness and insertion method when selecting a probe. Avoid using the needle to lever or force apart the material.
Measurement depth: Choose a needle that reaches the required location while keeping the handle clear of the sample.
Repeated testing: If replacement needles are required, select a compatible BT-3 to BT-8 model and include the appropriate BTN spare sets.
Instrument compatibility: Match Type E or Type K to the thermometer or logger input. Confirm the cable length and plug; the complete references above use an ANP miniature connector.
For other liquid and semi-solid measurement configurations, compare the Anritsu BS Series internal temperature probes.
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Measure temperature inside semi-solid materials with Anritsu BT Series needle temperature probes. Choose the needle diameter, length and tip shape to suit the measurement depth and material being tested.
Measure the internal temperature of liquids and semi-solid materials with Anritsu BS Series temperature probes. Choose a fine sleeve-type probe or a grip-type assembly according to the measurement depth, access and handling requirements.
Anritsu SF Series extra-fine flexible temperature probes for internal measurement in liquids, materials and confined locations.
Measure temperature at attached sensing points with Anritsu ST and STN flat leaf temperature probes. Their flexible tape construction suits surface attachment and measurement locations where a conventional rigid probe is difficult to position.
Anritsu ST and STN Series flexible flat-leaf temperature probes for surface attachment, narrow spaces and temperature distribution measurement.
Anritsu CR Series temperature probes for checking the tip temperature of soldering irons.
Anritsu BC Series needle probes for measuring the internal temperature of food, liquids and semi-solid materials.
Anritsu SX Series high-accuracy surface temperature probes with a flexible contact-support head for stable measurement on stationary surfaces.
Anritsu BR Series flexible low-temperature probes for measuring air, liquids and semi-solid materials in cold and controlled environments.
Measure stationary surface temperatures with Anritsu A Series contact probes. Select the head size, guard and shaft arrangement to suit the measurement point and operating temperature.
Need help maintaining surface contact as the holding angle changes? Compare the Anritsu AX Series flexible-head surface probe.
The Anritsu WE Series measures stationary surface temperatures using a self-supporting probe placed on the measurement target. Select the probe configuration to suit the surface, temperature and connected thermometer.
Anritsu HHT Series high-durability surface temperature probes for direct contact measurement of hot metal and industrial surfaces.
Anritsu UX Series flexible-head temperature probes for measuring moving and rotating surfaces with stable contact during measurement.
Anritsu MW series probes are ideal for measuring the temperatures at the surface of moving wires. Specific components may be combined to customize products for the needs of a customer's specific application.
Anritsu AX Series surface temperature probes with a flexible contact-support head for stable measurement on stationary surfaces.
Measure moving and rotating surface temperatures with Anritsu U and UX Series contact probes. Select the head, guard or wheel arrangement to suit the surface profile, temperature and operating conditions.
Anritsu VA Series clip-type surface temperature probes for measuring the temperature of small heat pipes and cylindrical surfaces.
