Flexible Implantable Probes
Physitemp’s miniature Type T thermocouple sensors provide the widest and most versatile selection of temperature probes available for bioscience and analytical chemistry applications. All our clinical probes and microprobes are made with Physitemp’s proprietary copper-constantan thermocouple wire and are guaranteed accurate to 0.1°C within the physiological range. All probes are interchangeable and do not require individual calibration when used with any of our Type T thermocouple instruments.
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Please note the following definitions in the product descriptions below:
Time Constant is defined as the time required to reach 63% of final temperature in liquid. An accurate reading is obtained when the reading stops changing, typically 5-10 time constants.
Maximum Temperature refers to intermittent use of probe. When probe is used for continuous measurements, maximum temperature should be reduced by 25% unless specified.
IT-14 Flexible Implantable Microprobe
Implantable in semi-solids and tissue with 14 gauge needle (supplied). Also for immersion in various solutions. Totally sheathed in chemical resistant Teflon™. Quite rugged. Maximum Temperature 150°C . Isolated. Probe diameter .050″ (14 gauge represents the needle gauge that the probe can be inserted through). Time constant 0.3 seconds.
Sterilization Protocol: Autoclavable, ETO Gas, Isoprophyl alcohol or gluteraldehyde solution
IT-18 Flexible Implantable Microprobe
Implantable in semi-solids and tissue with 18 gauge needle (supplied). Also for immersion in various solutions and rectal temperatures of small animals. Totally sheathed in chemical resistant Teflon™. Quited rugged. Maximum Temperature 150°C . Isolated. Probe diameter .050″ (14 gauge represents the needle gauge that the probe can be inserted through). Time constant 0.3 seconds.
Sterilization Protocol: Autoclavable, ETO Gas, Isoprophyl alcohol or gluteraldehyde solution
IT-21 Flexible Implantable Microprobe
Implantable in semi-solids and tissue with 21 gauge needle (supplied). Ideal for subcutaneous and cranial temperatures in small animals. Also for immersion in various solutions. Totally sheathed in chemical resistant Teflon™. Maximum Temperature 150°C . Isolated. Probe diameter .016″ (21 gauge represents the needle gauge that the probe can be inserted through). Time constant 0.08 seconds.
Sterilization Protocol: Autoclavable, ETO gas and Gluteraldehyde solution
IT-23 Flexible Implantable Microprobe
For ultra fast measurements and for use on micro-size specimens. Time constant 0.005 seconds. Tissue Implantable with a 23 gauge needle (supplied). Fairly fragile. Sensor wires are twisted TFE Teflon™ insulated. Maximum Temperature 150°C. Isolated. Probe diameter .011″, 3 foot lead.
Sterilization Protocol: Autoclavable, ETO Gas, Isoprophyl alcohol or gluteraldehyde solution
IT-1E Flexible Implantable Microprobe
For ultra fast measurements and for use on micro-size specimens. Similar to our most popular IT-18 microprobe but the sensor bead is exposed, resulting in the same ultra-fast response time of the IT-23 but with the Teflon™ sheath strength of the IT-18. Time constant 0.005 seconds. Tissue Implantable with a 18 gauge needle (supplied). Rather fragile at tip. Coated in Teflon™. Maximum Temperature 150°C. Isolated. Probe tip diameter .011″, sheath diameter .025” . 3 foot lead.
Sterilization Protocol: Autoclavable, ETO Gas, Isoprophyl Alcohol and Gluteraldehyde solution
IT-18(10 FOOT) Flexible Implantable Microprobe with 10 foot lead
Implantable in semi-solids and tissue with 18 gauge needle (supplied). Also for immersion in various solutions and rectal temperatures of small animals. Totally sheathed in chemical resistant Teflon™. Quited rugged. Maximum Temperature 150°C . Isolated. Probe diameter .050″ (14 gauge represents the needle gauge that the probe can be inserted through). Time constant 0.3 seconds.
Sterilization Protocol: Autoclavable, ETO gas, Isoprophyl Alcohol and Gluteraldehyde solution
IT-18EXLONG Flexible Implantable Microprobe with 5 foot lead
Implantable in semi-solids and tissue with 18 gauge needle (supplied). Also for immersion in various solutions and rectal temperatures of small animals. Totally sheathed in chemical resistant Teflon™. Quited rugged. Maximum Temperature 150°C . Isolated. Probe diameter .050″ (14 gauge represents the needle gauge that the probe can be inserted through). Time constant 0.3 seconds.
Sterilization Protocol: Autoclavable, ETO gas, Isoprophyl Alcohol and Gluteraldehyde solution
IT-24P Ultra Fine Flexible Microprobe
Tiny, 24 gauge polyurethane coated wire with polyester insulated thermocouple bead. For research applications to measure temperature in animal brains and other tissue. Fairly fragile, but very fast responding.
Wire cross section .005” x .0025”, Insulated tip maximum outside diameter .009”. Length 36” supplied on 1” diameter protective spool as shown. Maximum Temperature 70°C . Time constant 0.004 seconds.
Sterilization Protocol: Gas ETO, Gluteraldehyde, Isoprophyl Alcohol
| Sensor model | IT-18 | IT-14 | IT-21 | IT-23 | IT-1E | IT-18 (10 FOOT) | IT-18EXLONG | IT-24P |
| Sensor Tip Diameter | .025” | 0.05 | .016” | 0.011” | .009” | .025” | .025” | .009” |
| Accuracy (in the physiological range) | ±0.1°C | ±0.1°C | ±0.1°C | ±0.1°C | ±0.1°C | ±0.1°C | ±0.1°C | ±0.1°C |
| Time Constant: | 0.1s. | 0.3s. | 0.08s | 5ms | 5 ms | 0.1s | 0.1s | 4ms |
| Maximum Temperature | 150°C | 150°C | 150°C | 150°C | 150°C | 150°C | 150°C | 70°C |
| Minimum Temperature | -100°C | -100°C | -100°C | -100°C | -100°C | -100°C | 0°C | |
| Lead Length | 3 ft. | 3 ft. | 1 ft. | 3 ft. | 3 feet | 10 feet | 5 feet | 3 feet |
