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CALIBRATION SOLUTIONS
Reference Probes - Semi Standards
http://
www.isotechna.com
-196 to 670°C
Platinum Resistance Thermometers
High Stability Reference Probes
Wide Temperature Ranges
High Stability Platinum Coil Elements
These industrial platinum resistance thermometers are
ideal for field and lab use. Suitable for use as working
standards in Dry Blocks and Liquid Baths or as high
accuracy probes for our range of True Temperature
Indicators.
All the thermometers are metal sheathed and both less
fragile and more affordable than the Isotech range of
true Standard Platinum Resistance Thermometers that
are used in laboratories and are found in our publication
“Solutions for Primary and Secondary Laboratories”.
All the thermometers use handmade coil wound
platinum sensing elements to give high accuracy and
low drift. Isotech’s UKAS accredited lab can calibrate to
the smallest of uncertainties.
Calibration should be specified to suit the particular
operating range and application. Isotech can advise on
which service is appropriate to match the temperature
range and application.
Universal Specifications
Ro 100Ω ± 0.05 Ω
Alpha 0.003850 ± 0.000005
Standard IEC 60751
Stability 0.010 Ω/year
Recommended Current 1mA
Self Heating at 1mA 0.004°C
Calibration Optional UKAS Calibration at extra cost.
See table for typical uncertainties
Connection Four Wire
After manufacture all Isotech
Semi Standard PRTs are thermally
pre-conditioned to provide
optimal stability.
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CALIBRATION SOLUTIONS
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Sensing Element
n General Purpose Probes
Sensing Element
Sensing Element
Model Range Diameter Length Sensing Handle Cable Application
(A) Length (B) (C)
935-14-61 -50°C to 250°C 4mm 300mm 6mm 19 x 30mm 2m PTFE Fast Response, Low
Stem Conduction
935-14-13 -196°C to 250°C 6mm 350mm 25mm 19 x 30mm 2m PTFE Low Temperature
935-14-16 -100°C to 450°C 6mm 450mm 25mm 19 x 30mm 2m PTFE General Purpose
935-14-72 -50°C to 670°C 6mm 375mm 25mm No Handle 2m PTFE Fits Jupiter / Gemini
Carry Case
935-14-98 -50°C to 350°C 4mm 300mm 8mm No Handle 2m PTFE Low Stem Conduction
n Angled Probes - angled head provides maximum clearence at top of calibration bath
Model Range Diameter Length Sensing (C) Cable Application
(A) Length (B)
935-14-82 -50°C to 250°C 4mm 210mm 6mm 50mm 1.5m PTFE Europa - Venus - Calisto
935-14-85 -50°C to 250°C 6mm 420mm 25mm 35mm 0.54 m PTFE Oceanus-6
n Working Industrial Standards
These thermometers use premium grade wire wound elements to IEC-751 and the same internal construction as our working
Standard SPRTs. The 95L is optimised for low temperature with minimum stem conduction. The 95H is optimised for high
temperature operation. Both models employ strain free construction.
Model Range Diameter Length Sensing Handle Cable
(A) Length (B) (C)
935-14-95L -200°C to 165°C 6mm 480mm 25mm 19 x 30mm 2m PTFE
935-14-95H -80°C to 670°C 6mm 480mm 25mm 19 x 30mm 2m PTFE
Termination Options
Bare Wire (BW)
TTI suit TTI-1 to TTI-7, TTI-b – suits TTI-22
DB Connector for Dry Block Calibrator Site Indicator
How to Order
Please Specify Model Type and Termination Option
(for example 935-14-13/BW)
Please state whether UKAS Certification is required
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