NTC Miniature
Series
Thermometrics
Thermoprobes
Applications Descriptions
NTC Type P20, P25 and P30 NTC Type P20, P25 and P30
Miniature bead-in-glass probes feature high The Type P20, P25 and P30 miniature thermprobes
reliability, ease of handling and very fast response consist of a small bead thermistor hermetically
time. The longer body length makes them sealed in the tip of a shock-resistant solid glass rod.
particularly well-suited for applications where fast The miniature thermoprobes have improved stability
response and immersion in fluids are the major over glass coated and ruggedized glass bead
requirements. thermistors.
NTC Type P60, P65, P85 and P100 NTC Type P60, P65, P85 and P100
Thermoprobes are recommended for all low cost , The Type P60, P65, P85 and P100 thermoprobes
general purpose applications involving temperature consist of a large bead thermistor hermetically
measurement and control, circuit temperature sealed in the tip of a shock resistant solid glass rod.
compensation, liquid level sensing or fluid flow They have excellent long-term stability.
sensing. They are ideally suited for applications, that
require a reliable, low cost sensor.
Amphenol
Advanced SensorsType P20/25/30 Specifications
NTC Types
P20/25/30
dimensions
Thermal and Electrical Properties (All Def initions and Test Methods are Per MIL-PRF-23648)
Body Thermistor Type:
P20 P25 P30
Dimensions:
Minimum Diameter: .020 in (.51 mm) .025 in (.64 mm) 030 in (.76 mm)
Standard code AA .063 in (1.6 mm)
Body L code A .125 in (3.2 mm) .125 in (3.2 mm) .125 in (3.2 mm)
Lengths code B .250 in (6.3 mm)** .250 in (6.3 mm) .250 in (6.3 mm)
Lead-wires:
Nom. Diameter: .0011 in (.03 mm) .002 in (.05 mm) .003 in (.08 mm)
Minimum Lead Length: .250 in (6.3 mm) .250 in (6.3 mm) .250 in (6.3 mm)
Lead Material: Platinum Alloy Platinum Alloy Platinum Alloy
Material System: Nominal Nominal
Resistance Resistance Resistance
Code R-vs-T 25/125 Range @ Range @ Range @
Letter Curve Ratio 77F (25C) 77F (25C) 77F (25C)
E 0 5.0
A 1 11.8 300 to 680 300 to 680 100 to 300
A 2 12.5 680 to 1.6 k 680 to 1.6 k 300 to 750
A 3 14.0 1.6 k to 3.6 k 1.6 k to 3.6 k 750 to 1.5 k
A 4 16.9 3.6 k to 6.8 k 3.6 k to 6.8 k 1.5 k to 3.0 k
A 5 19.8 6.8 k to 27 k 6.8 k to 27 k .0 k to 6.8 k
A 6 22.1 6.8 k to 13 k
A 7 22.7 27 k to 75 k 27 k to 75 k 13 k to 18 k
B 8 29.4 75 k to 130 k 75 k to 130 k 18 k to 51 k
B 9 30.8 130 k to 240 k 130 k to 240 k 51 k to 82 k
B 10 32.3 240 k to 360 k 240 k to 360 k 82 k to 150 k
B 11 35.7 360 k to 820 k 360 k to 820 k 150 k to 330 k
B 12 38.1 820 k to 1.3 M 820 k to 1.3 M 330 k to 680 k
B 13 45.0 1.3 M to 3.3 M 1.3 M to 3.3 M 680 k to 1.5 M
B 14 48.1 3.3 M to 6.8 M 3.3 M to 6.8 M 1.5 M to 3.0 M
B 15 56.5 6.8 M to 10 M 6.8 M to 10 M 3.0 M to 6.2 M
D 16 75.6 6.2 M to 10 M
D 16 81.0
Thermal Time Constant: Still Air at 77F (25C): 1.6 sec 2.0 sec 3.0 sec
Plunge into Water: 18 msec 23 msec 60 msec
Dissipation Constant: Still Air at 77F (25C): .14 mW/C .16 mW/C .30 mW/C
Still Water at 77F (25C): .70 mW/C .80 mW/C 1.50 mW/C
Power Rating: (in air) Maximum Power Rating: .020 Watts .025 Watts .035 Watts
100% Max. Power to: 302 (150C) 302 (150C) 302 (150C)
Derated to 0% at: 572F (300C) 572F (300C) 572F (300C)
Resistance vs temperature characterstics: The nominal resistance range for the zero-power resistance at 77F (25C) is shown for each miniature bead-in-glass thermoprobe type and each
available material system. Each material system is denoted by an ordering code letter, a referenced curve number and the nominal 77F/257F (25C/125C) resistance ratio.
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