Thermistors


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Series 400 Thermistor Probes Barnant (Oakton Home)

Our thermistor probes are specially designed for soil, liquid, air or surface temperature applications. Use with any meter that accepts YSI 400 series probes. All probes are accurate to ą0.1°C from 0 to 70°C. All integral handle probes include 5-ft coiled cable with 1/4" phone plug. All permanent, special purpose probes (except 93823-00) include a vinyl covered 10-ft lead with 1/4" phone plug. Do not expose lead wires and phone plugs to temperatures over 212°F(100°C).

Probes are accurate to ą0.1°C from0 to 70°C. All probes include a certificate indicating traceability to NIST standards . Electrically isolated probes come with a non-detachable 10-ft lead with phone plug (except as noted)

Water - resistant junctions between probe and lead should not be immersed; detachable leads are not water resistant. Note: Time constant is estimated time required to reach 63.2% of new reading. To determine how long it will take to reach 99% of a new reading multiply the time constant by five.

ORDERING INFORMATION

Cat. no.	Description	Temperature Range	Time constant
8430-00 (401)	General-purpose probe, immersible for short-term deep-water and subsoil readings. Vinyl sheath and tip.	-40 to 212°F (-40 to 100°C)	7 second
8430-52	Like 8430-00 above, but with 50-ft lead
8430-12	Like 8430-00 above, but with 100-ft lead
8432-00 (402)	Small flexible probe, vinyl sheath and tip	-40 to 212°F (-40 to 100°C)	3.2 second
8434-00 (403)	Liquid immersion probe 5/32" dia stainless steel (316 SS). Immersible only to cap unless waterproofed.	-40 to 302°F (-40 to 150°C)	3.4 second
8436-00 (406)	Like 8434-00 above, but with 1/8" dia probe	-40 to 302°F (-40 to 150°C)	2.5 seconds
8446-00 (404)	Liquid-immersion probe, chemically inert for thermometric titrations. PYREXŽ glass sheath.	-40 to 302°F (-40 to 150°C)	4.2 second
8484-00 (423)	Small flexible probe, for frozen food packages and cuvettes. Nylon and epoxy tip.	-110 to 212°F (-80 to 100°C)	1.4 seconds
8459-10 (44033)	Epoxy-encapsulated thermistor element. Maximum intermittent temperature is 212°F(100°C). Copper wire is 32 gauge; 3" long.	-40 to 167°F (-40 to 75°C) for continuous use.	1 sec in oil; 10 sec in air.
7549-99	1/4" phone plug for 08459-10(above)	-	-
8444-00 (410)	Pipe-fitting probe for closed pipes or vessels. Probe and fitting are 316SS; not autoclavable; non-detachable lead. Not electrically isolated; 4-1/2"long.	-40 to 300°F (-40 to 150°C)	3.4 seconds
8449-00 (416)	Pipe-fitting probe for closed pipes or vessels. Probe and fitting are 316SS;antoclavable except lead; lead ia detectable via BNC connector. Not electrically isolated; 1"long.	-40 to 300°F (-40 to 150°C)	3.4 seconds
8438-00 (405)	Air temperature probe for test rooms, gas stream temperatures, and incubators. 316SS cage around epoxy encapsulated thermistor.	-40 to 300°F (-40 to 150°C)	10 seconds
8442-15 (409B)	Attachable surface probe, recommended for skin temperature measurements. Vinyl covered parallel leads.	-40 to 212°F (-40 to 100°C)	1.1 seconds
8440-00 (408)	Surface probe for skin, flat surface, and soil temperatures. Disk is 316 SS; probe includes handle.	-40 to 300°F (-40 to 150°C)	0.6 seconds
8481-00 (418)	Penetration probe for insertion into semi-solids like fruit, soil, tobacco. No handle. All 316 SS, with vinyl-covered lead.	-40 to 300°F (-40 to 150°C)	3.7 seconds

Cat. no.	Description	Time constant
Integral - handle probes with sturdy 5.25"L glass filled nylon handle.
93824-00	General purpose immersion probes. 316 SS sheath Range: -22 to 212°F(-30 to 100°C)	4 seconds
93824-12	General purpose TEFLONŽ - coated 316 SS probe Range: -22 to 212°F(-30 to 100°C)	7 seconds
93824-30	Penetration probe, 316 SS sheath Range: -22 to 212°F(-30 to 100°C)	6 seconds
Special-purpose probes (Longer lead lengths are available by special order, please call our Application Specialists.)
93823-00	Deep water/soil probe. Weighted and insulated for continuous use underwater. Probe is rubber-coated 316 SS with waterproof PVC over TEFLON-covered 50-ft lead.	5 seconds
93823-05	Air/gas probes. Exposed element is in a perforated protective shield. Sheath is 316 stainless steel.	2 seconds
93823-01	Surface temperature probes. Epoxy covered sensor is in a screw-mount 1/4" thick aluminum housing. Easy to mount on flat surfaces.	8 seconds