TD4A Datasheet TD4A, TD5A | P1-P3

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Temperature Sensors TD Series

Honeywell1 Sensing and Control11-800-537-6945 USA1F1-815-235-6847 International11-800-737-3360 Canada

FEATURES

1 Interchangeable without sensor-to-

sensor recalibration

1 Very small thermal mass for fast re-

sponse

1 Air or liquid temperature sensing

1 Linear temperature sensitivity

1 Proven thin film processing reliability

1 Low cost

1 Long term stability

1 2000 ohms nominal resistance at 20°C

TYPICAL APPLICATIONS

1 HVAC – room, duct and refrigerant

temperature

1 Motors – overload protection

1 Electronic circuits – semiconductor

protection

1 Process control – temperature regula-

tion

1 Automotive – air or oil temperature

1 Appliances – cooking temperature

GENERAL INFORMATION

TD Series temperature sensors from

MICRO SWITCH respond rapidly to tem-

perature changes, and are accurate to

±0.7°C at 20°C—completely inter-

changeable without recalibration. They

are RTD (resistance temperature detec-

tor) sensors, and provide 8 V/°C sensitiv-

ity, with inherently near linear outputs.

The sensing element is a silicon chip,

0.040 × 0.050N with a thin film resistive

network pattern. The chips are individual-

ly laser trimmed to provide 2000 ohms

nominal resistance at room temperature

(20°C), accurate to ±0.7°C. Maximum er-

ror over the entire operating range of −40

to +150°C (−40 to +302°F) is ±2.5°C.

This extremely accurate trimming pro-

vides true sensor-to-sensor interchange-

ability without recalibration of the user

circuit.

TD4A Liquid temperature sensor

TD4A liquid temperature sensor is a two-

terminal threaded anodized aluminum

housing. The environmentally sealed liq-

uid temperature sensors are designed for

simplicity of installation, such as in the

side of a truck. TD4A sensors are not

designed for total immersion. Typical re-

sponse time (for one time constant) is 4

minutes in still air and 15 seconds in still

water (unmounted position). The temper-

ature rise is 0.12°C/milliwatt suspended

by leads in still air, and 0.08°C/milliwatt

when mounted on 1 square foot 0.25N

thick aluminum foil.

TD5A Miniature temperature sensor

The TD5A is a subminiature temperature

sensor with three leads (center not con-

nected). It has response times of 11.0 sec-

onds and a temperature rise of .23°C per

milliwatt in still air.

TD4A

TD ORDER GUIDE

Catalog

Listing Description

TD4A Liquid temperature sensor, 1.5° threaded (3/8-24 UNF-2A) anodized

aluminum housing, two six inch black insulated leads

TD5A Subminiature package, low cost, fast response time (TO-92)

MOUNTING DIMENSIONS (for reference only)

TD5A

Center lead

not connected

Temperature

Temperature SensorsTD Series

Honeywell1 Sensing and Control11-800-537-6945 USA1F1-815-235-6847 International11-800-737-3360 Canada

ABSOLUTE MAXIMUM RATINGS

Operating temperature range−40 to +150°C (−40 to +302°F)

Storage temperature range−55 to 165°C (−67 to +338°F)

Voltage10 VDC Continuous (24 hours)

INTERCHANGEABILITY (with 100 mA maximum current)

Temperature Resistance (Ohms) Temperature Resistance (Ohms)

−40°C (−40°F) 1584 ± 12 (1.9°C) +60°C (140°F) 2314 ± 9 (1.1°C)

−30°C (−22°F) 1649 ± 11 (1.7°C) +70°C (158°F) 2397 ± 10 (1.2°C)

−20°C (−4°F) 1715 ± 10 (1.5°C) +80°C (176°F) 2482 ± 12 (1.4°C)

−10°C (14°F) 1784 ± 9 (1.3°C) +90°C (194°F) 2569 ± 14 (1.6°C)

0°C (32°F) 1854 ± 8 (1.1°C) +100°C (212°F) 2658 ± 16 (1.8°C)

+10°C (50°F) 1926 ± 6 (0.8°C) +110°C (230°F) 2748 ± 18 (2.0°C)

+20°C (68°F)2000 ±5 (0.7°C)+120°C (248°F)2840 ±19 (2.0°C)

+30°C (86°F) 2076 ± 5 (0.7°C) +130°C (266°F) 2934 ± 21 (2.2°C)

+40°C (104°F) 2153 ± 6 (0.8°C) +140°C (284°F) 3030 ± 23 (2.4°C)

+50°C (122°F) 2233 ± 7 (0.9°C) +150°C (302°F) 3128 ± 25 (2.5°C)

It is recommended that resistance measurements be made at 100 mA or less to minimize internal

heating of the sensor. Measurements at currents up to 1mA will not damage the sensor, but the

resistance characteristics should be adjusted for internal heating.

Equation for computing resistance:

J R

+ (3.84 × 10

-3

× R

× T) + (4.94 × 10

-6

× R

× T

)

J Resistance at temperature T

J Resistance at 0°C

T J Temperature in °C

Figure 2

Linear Output Voltage Circuit

Figure 3

Adjustable Point (Comparator) Interface

Linearity

±2% (−25 to 85°C)

±3% (−40 to 150°C)

TD sensors can be linearized to within

±0.2%.

Repeatability

±1 V

Figure 1

TD Series Resistance vs Temperature

ELECTRICAL INTERFACING

The high nominal resistance, positive

temperature coefficient and linear sensi-

tivity characteristics of the TD Series tem-

perature sensors simplifies the task of de-

signing the electrical interface. Figure 2 is

a simple circuit that can be used to linea-

rize the voltage output to within 0.2% or a

±0.4°C error over a range of −40° to

+150°C (−40° to +302°F).

In some applications, it may be desirable

to detect one particular temperature. Fig-

ure 3 illustrates one way this can be ac-

complished. In the comparator circuit

shown, the potentiometer can be adjust-

ed to correspond to the desired temper-

ature.

P1-P3

TD4A

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Industrial Temperature Sensors liqud temp;leadwires anodized alum housng

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