Choosing a Temperature Probe: World Precision Instruments

Flexible Teflon microprobes are used for implantation in tissue, in spectrophotometer cuvettes, rectally in neonatal mice, in water baths, PCR thermal cyclers, etc.
Animal rectal temperatures during surgical procedures and pyrogen testing.
Skin temperature measurement during exercise physiology studies.

When precise temperature measurements are required, WPI can provide you with a very accurate monitor and thermocouple microprobes. WPI monitors have both resolution and accuracy of 0.1°C in the 0-50°C range and are traceable to NIST standards, whereas, other competitive electronic thermometers have an accuracy that is usually to 0.5°C or worse. Furthermore, all our type T clinical probes are guaranteed accurate to 0.1°C, due to our stringent wire standards. These are five times more accurate than competitive probes made with regular “Special Limits” wire.

Probe Sterilization Methods:

The needle microprobes and animal rectal probes are all designed to withstand sterilization by ETO gas and gluteraldehyde solution. Our flexible implantable microprobes are both ETO gas sterilizable and autoclavable.

NEEDLE MICROPROBES
Fast-response needle probes for instant readings in tissue, semisolids, liquids, very small specimens, powders and materials. Needle tip is sealed to ensure only stainless steel contacts specimen.

ORDER CODE	SIZE	STYLE	TIME CONSTANT	ISOLATED	MAX TEMP	LEAD LENGTH	DESCRIPTION
MT-29/1HT	29 ga/1cm	A	0.125 sec	No	200°C	5 ft	29 gauge approximately 0.013-in
MT-29/2	29 ga/2cm	A	0.125 sec	No	200°C	5 ft	-
MT-29/3	29 ga/3cm	A	0.125 sec	No	200°C	5 ft	-
MT-29/5	29 ga/5cm	A	0.125 sec	No	200°C	5 ft	-
MT-26/2	26 ga/2cm	A	0.1 sec	No	200°C	5 ft	26 gauge approximately 0.018-in
MT-26/4	26 ga/4cm	A	0.1 sec	No	200°C	5 ft	-
MT-26/6	26 ga/6cm	A	0.1 sec	No	200°C	5 ft	-
MT-23/3	23 ga/3cm	A	0.15 sec	No	200°C	5 ft	23 gauge approximately 0.125-in
MT-23/5	23 ga/5cm	A	0.15 sec	No	200°C	5 ft	-
MT-23/8	23 ga/8cm	A	0.15 sec	No	200°C	5 ft	-
MT-4	29 ga/1cm	A	0.025 sec	No	200°C	5 ft	Similar to MT-29/1 but has a blunt tip. Good for instant skin and surface temperatures, liquids
MT-D	-	C	0.025 sec	No	200°C	5 ft	Fast response surface probe (stainless steel for locating inflammation, arteries, etc. Also for dental use.

FLEXIBLE IMPLANTABLE PROBES
Designed for high accuracy on extremely small specimens such as insects, seeds, etc. Maximum insertion depth 1/8". Totally sheathed in chemical resistant Teflon.

ORDER CODE	SENSOR LEAD DIAMETER	STYLE	TIME CONSTANT	ISOLATED	MAX TEMP	LEAD LENGTH	DESCRIPTION
IT-14	0.050" dia	D	0.3 sec	Yes	150°C	3 ft	-
IT-18	0.025" dia	D	0.1 sec	Yes	150°C	3 ft	-
IT-18EXLONG	0.025” dia.	D	0.1 sec	Yes	150°C	5 ft
IT-21	0.016" dia	D	0.08 sec	Yes	150°C	1 ft
IT-23	0.009" dia	E	0.005 sec	Yes	150°C	3 ft	For ultra fast measurements and for use on micro-size specimens. Tissue implantable with 239a. Needle (supplied). Rather fragile. Teflon coated.
IT-1E	0.025" dia	F	0.005 sec	Yes	150°C	3 ft	As IT-18 sensor except bead exposed. Combines ultra- fast reponse of IT-23 with sheath strength of IT-18.
RECTAL PROBES
PROBE TYPE	SENSOR LEAD DIAMETER	STYLE	TIME CONSTANT	ISOLATED	MAX TEMP	LEAD LENGTH	DESCRIPTION
RET-2	-	G	0.8 sec	No	125°C	5 ft	Rectal probe for rats typically for fast intermittent measurements. Smooth ball tip (0.125-in. dia.) with 1" long (0.59-in. dia) stainless steel shaft.
RET-3	-	G	0.5 sec	No	125°C	5 ft	Rectal probe for mice similar to RET-2 except tip diam. 0.063-in. and shaft 3/4-in. long (0.028-in. diam.)

GENERAL PURPOSE

ORDER CODE	STYLE	TIME CONSTANT	ISOLATED	MAX TEMP	LEAD LENGTH	DESCRIPTION
HT-1	H	0.5 sec	No	400°C	5 ft	“Workhorse” probe for liquids, gases, semi-solids. Plastic handle with straight stainless steel shaft. Not good for surface temperatures.
HT-2	H	0.5 sec	No	400°C	5 ft	Like HT-1 except shaft length is 9-in.