The DT64 series of silicon diode thermometers utilize specially designed silicon diodes suitable for low-temperature temperature measurements. Compared to ordinary silicon diodes, the DT64 series silicon diodes are characterized by good repeatability, low dispersion, and easy measurement at low temperatures due to the relatively high temperature dependence of the resistance value. All DT64 series silicon diode thermometers follow a voltage-temperature (V-T) curve better, resulting in better interchangeability.

Features

 Low excitation current and thus small self-heating effect; Conforms to standard curves and has good interchangeability; Multiple packages, not easily damaged, resistant to temperature shocks, and easy to install.

Parameters and Specifications

Lead wire length: 1 meter, four-wire; Lead wire material: four-color phosphor bronze low-temperature wire; Standard curve: DT64 standard curve; Temperature range: 4K~325K; Recommended excitation current: 10µA ±0.1%; Maximum reverse voltage: 75V; Maximum current before damage: 100mA for long time or 500mA for an instant; Recommended dissipation under excitation: 20µW@4.2K; 10µW @77K; 6µW@300K; Radiation effect: only recommended for use in low radiation situations; Magnetic field effect: not recommended for use in magnetic field environments; Repeatability: ±10mK@77K (from 100 thermal shock tests from 300K to 77K). 

Package form:

 Ordering Information

Temperature Range and Accuracy:

Calibration Range Temperature Range Calibration Range Accuracy 

4L 3K~325K 3K~325K ±0.1K 

65L 65K~325K 65K~325K ±0.1K 

Thermometer Accuracy = (Calibration Uncertainty2 + Repeatability2) 0.5 

Model Interpretation:

DT: Diode Thermometer 64: 0.64V@273.15K BO: Bobbin, Pie Type 4L: 4K~325K 

 PI: Pipe, Tube Type 70L:70K~325K 

 MS: Metric Screw 

Selection Chart:

Model No. DT64-BO DT64-PI DT64-MS 

4L √ √ √ √ 

70L √ √ √ √ 

Attachment: Dimension Drawing (mm)