FTY Series / PTC thermistors

Product catalog summary

Overview: The FTY Series PTC thermistors are silicon temperature sensors with a positive temperature coefficient of resistance, suitable for measurement and control systems. They offer high accuracy, reliability, long-term stability, and a virtually linear characteristic.

Specifications:

Sensing Element: Silicon sensor element
Temperature Range: -40°C to +150°C
Max Constant Current @25°C: 10mA
Rated Working Current @25°C: 5mA
Rated Power: 50mW
Thermal Time Constant: 60s in still liquid

Technical Data:

Sensor Resistance (R25): Varies by model (e.g., KTY83-110: 990-1010 Ω)
Temperature Coefficient (TC): 0.76 %/K
Resistance Ratios: R100/R25: 1.65-1.69, R-55/R25: 0.49-0.51
Thermal Time Constants: 60s in still air, 38s in still liquid, 20s in flowing liquid

Sensor Assembly:

Temperature Sensing Element: Models KTY83-110/120/121/122/150/151
Housing: Various materials and sizes available
Cable: 2-4 wires, various materials, gauges, and lengths available

Ordering Code: The ordering code is structured as FTK xx x x x x x x, where each segment represents specific product attributes such as series, housing shape, resistance value, tolerance, and wire type and length.

Catalog excerpts

PTC thermistors The temperature sensor is a kind of silicon temperature sensor, it have a positive temperature coefficient of resistance and suitable for use in measurement and control systems. Tolerances of 0.5% or other special selections are available on request. Typical Applications Features • Temperature measurement • High accuracy and reliability • Control system • Long term stability • Positive temperature coefficient • Virtually linear characteristic Technical Data Item Sensing Element silicon sensor element Max working temperatures range Rated working current @25°C Rated Power: PDIS Thermal Time Constant Within 60s in still liquid FTY V1.0/Modification rights reserved www.focusens.com

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PTC thermistors Symbol Parameter Conditions Min Typ Max Unit Sensor Resistance KTY83-110 990 t thermal time constant (1) in still liquid - rated temperature range -40 - +150 °C (1) The thermal time constant is the time taken for the sensor to reach 63.2% of the total temperature difference. Sensor Assembly Item Description Remarks 1 Temperature Sensing Element 3 cable (1) Please consult the sales staff Various housing material and size available 2 -4 wires, various wire material, gauge and length available FTY V1.0/Modification rights reserved www.focusens.com

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PTC thermistorsOrdering code FTK xx x x x x x x (1) (2) (3) (4) (5) (6) (7) (8) (1) Focusens PTC series temperature sensor product. 3x Naked resistance sensor without shell 4x surface installation 5x Multi-step type house 8x Pipe clamp type (3) Resistance value at 25°C, unit kQ (4) Resistance tolerance at 25°C. If tolerance is 20Q showed by “2”. (6) House size, please consult the sales staff. (8) Wire length, unit: cm. FTY V1.0/Modification rights reserved www.focusens.com

Open the catalog to page 3

FTY Series / PTC thermistors

FTY Series / PTC thermistors

Catalog excerpts

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