Products

Standard Platinum Resistance Thermometer

Model number

・MODEL BB660 / 25.5
・MODEL BB(S)962 / 2.5

The BB660/25.5 and BB(S)962/2.5 are single-coil standard platinum resistance thermometers developed and commercialized as interpolation instruments for The International Temperature Scale of 1990 (ITS-90) through joint research with the National Metrology Institute of Japan (NMIJ) of the National Institute of Advanced Industrial Science and Technology (AIST).
Single-coil standard platinum resistance thermometers have many features and advantages, such as a simple structure, low processing distortion during assembly, excellent vibration resistance, low self-heating, and good response characteristics.

Features

■Temperature range：
MODEL BB660 / 25.5 　-196°C – 660°C
MODEL BB(S)962 / 2.5 　660°C – 962°C

・The BB660/25.5 utilizes a new temperature sensing structure, taking advantage of the characteristics of the single coil type to improve stability at high temperatures and reduce costs.(registered trademark No. 3380523).
・The BB(S)962/2.5 uses single crystal sapphire for the protective tube and temperature sensor winding frame, which improves gas tightness and insulation properties and increases stability under high temperatures.

Specifications

	MODEL BB660 / 25.5	MODEL BB(S)962 / 2.5
Thermal Sensors	Non-inductive winding of platinum wire on a quartz winding frame (length ≦ 40 mm)	Non-inductive winding of platinum wire on a single crystal sapphire winding frame (length ≦40 mm)
Inner Conductor	Platinum wire (4-wire)	Platinum wire (4-wire)
Protective Tube	φ7mm × about 570mm (Adapter bottom length) / Quartz Tube	φ7mm × about 570mm (Adapter bottom length) / Single Crystal Sapphire
Adapter	φ19mm × about 100mm / Aluminum outer cylinder	φ19mm × about 100mm / Aluminum outer cylinder
External Conductor	Copper (4 wires), fluororesin insulation, cross-linked polyethylene coating; 2.5m	Copper (4 wires), fluororesin insulation, cross-linked polyethylene coating; 2.5m
Operating Temperature	-189.3442°C (Triple point of Ar) – 660.323°C (Freezing point of Al)	660.323°C (Freezing point of Al) – 961.78°C (freezing point of Ag)

Characteristics

	MODEL BB660 / 25.5	MODEL BB(S)962 / 2.5
Temperature Characteristics	W (29.7646°C) ≧ 1.11807	W（29.7646°C）≧ 1.11807 and W (961.78°C) ≧ 4.2844
Reproducibility	Within 1mK	Within 5mK

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Standard Platinum Resistance Thermometer

Features

Specifications

Characteristics

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