Overview

The T-GAGE analog sensor is a passive, non-contacting, temperature-based

device. It is used to detect object temperature within a sensing window and

output a proportional voltage or current.

detects the infrared light energy emitted by objects, instead of its own emitted

light. The sensor uses a thermopile detector, made up of multiple infrared-

sensitive elements (thermocouples) to detect this infrared energy within its field of

view (see

Figure 2 on page 2).

Potential applications include:

• Hot part detection (baked goods, metals, bottles, rubber)

• Ejection verification of injection-molded parts

• Flame process verification

• Hot glue detection (packaging equipment, book binding)

• Cold part detection (frozen foods, ice, dairy)

• Roller monitoring

Figure 1. Sensor Features

1.

Power LED

2.

Alarm Output LED

3.

Push Button

Note: The T-GAGE M18T sensor is not intended for absolute temperature measurement or for safety-related fire detection use.

Note: Le T-GAGE M18T n'est pas conçu pour une mesure de température absolue ni pour une utilisation dans le cadre de

sécurité pour la détection de feu.

Indicators

Power ON/OFF LED

Indicates

OFF

Power is OFF

ON Green

Sensor is in Run mode

ON Red

TEACH is active

Alarm Output LED

Indicates

OFF

Run Mode: Alarm output is OFF

2-Point TEACH active: Waiting for Span condition

ON Amber

Run Mode: Alarm output is energized

2-Point TEACH active: Waiting for Null condition

Flashing Amber

Dynamic TEACH active

Sensing Field of View

Sensing range is determined by the sensor’s field of view or viewing angle, combined with the size of the object(s) being detected. See

Figure 2 on

page 2. The sensor’s distance-to-spot size ratio (D:S ratio) is inversely related to the viewing angle; a sensor with a small viewing angle will have a

large D:S ratio. The T-GAGE M18T sensors have D:S ratios of 6:1, 8:1 or 14:1. For a sensor with an 8:1 D:S ratio, the sensor spot size is a 1"

diameter circle at a distance of 8"; farther from the sensor face the spot size will be larger.

200

400

600

800

1000

Distance (mm)

Spot Size

(see table)

Sensor D:S Ratio

Distance from Sensor Face Versus Spot Size

100

200

300

400

500

600

700

800

900

1000

Distance (mm)

6:1

17

33

50

67

83

100

117

133

150

167

Spot Size (mm)

8:1

13

25

38

50

63

75

88

100

113

125

14:1

7

14

21

29

36

43

50

57

64

71

Figure 2. Detection spot size versus distance from sensor

2

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