Product guide

19
...setting the standard again and again
®
▼ THERMISTOR
Thermistor Selection Guide
What is a thermistor?
A thermistor is a thermally sensitive resistor which
changes electrical resistance due to temperature
changes. It has very predictable characteristics and
offers long-term stability.
Why choose a thermistor?
Thermistors have excellent accuracy over the
biological or ambient temperature ranges when
compared to thermocouples or RTDs, but have a
limited temperature range that usually cannot exceed
300°F (150°C). Response times are generally faster
than other types of probes.
Other thermistor series
Unless otherwise specified, Oakton thermistor
thermometers are designed for use with 400-series
probes. These probes provide accurate thermistor
results and are interchangeable with little probe-to-
probe variation. Oakton meters can be used with
500-series probes (not offered by Oakton) but will
require the user to consult a conversion chart typically
provided with the 500-series probe. The 500-series
probes have significant probe-to-probe variability
that can not be compensated for in the meter. Oakton
meters are not compatible with 700-series probes.
WD-17002-06 NIST-traceable certificate for Thermistor system
(meter + probe)
WD-17000-06 NIST-traceable certificate for Thermistor meter
WD-17001-06 NIST-traceable certificate for Thermistor probe
Service includes test data calibrated at four
temperature test points.
General-Purpose 400-Series
Thermistor Probes
Ideal for measurement in liquids or semisolids
Use our thermistor probes to measure temperature when accuracy within the biological
range is important. All probes include a 5-ft PVC coiled cord with strain relief that
protects from repeated flexing and tugging. Ergonomic, easygrip 5"L glass-filled nylon
handle provides maximum heat insulation and impact resistance. Fingerstops on
handle prevent probe from rolling and fingers from sliding when inserting probe into
hard materials. The 316 stainless steel sheath (tip casing) provides durability, strength,
and maximum abrasion resistance. All probes come with a
1
⁄4" phono plug connector.
Compatible with all Oakton and Acorn
®
thermistor thermometers.
Key Catalog number Temperature range Tip length Dimensions
A
WD-93824-00
–22 to 212°F (–30 to 100°C) 10"
B
WD-93824-30
–22 to 212°F (–30 to 100°C) 4"
C
WD-93824-12
–22 to 212°F (–30 to 100°C) 10"
0.188" dia
10"
0.200" dia
10"
4"
0.188" dia
A
General-Purpose: Designed for
most common and liquid immersion
applications.
B
Penetration: Pointed tip style for
penetration into hard and semisolid
materials. Sturdy stainless steel tip
casing prevents tip from bending when
inserting.
C
PTFE-Coated: Same as our general-
purpose tip above, but this tip has a PTFE
coating over the casing for use with acids
and strong chemicals.
Nylon handle
A
General-purpose tip
C
PTFE-coated tip
B
Penetration tip
You’ll find more thermistor probes on page 23.
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