Temperature Sensors 6A/8A FI-T8

FI-T8 - Temperature Sensors 6A/8A

  • CE Marking
  • CSA




Supported pipe diameter

1/8", 1/4"
(6 A, 8 A)
ø8–14 ø0.31"–0.55"

Supported pipe materials

Metal piping

Supported temperature range

−20 to +180°C –4 to +356°F*1

Display method

Organic EL, status indicator light

Display resolution

0.1°C 32.18°F

Response time

5 s (50% response), 15 s (90% response)*2

Display amplifier averaging time

0.1 s / 10.0 s / 20.0 s / 30.0 s / 60.0 s / 120.0 s / 300.0 s

Measurement accuracy

±0.5°C ±0.9°F (pipe temperature −20 to +80°C –4 to 176°F) (ambient temperature of 25°C 77°F)*2*3
±1.0°C ±1.8°F (pipe temperature 80–180°C 176–356°F) (ambient temperature of 25°C 77°F)*2*3



Measurement principle

Pt100 4-wire type

Power I/O connector

M8 4-pin connector

Power supply

Current consumption

20 mA or less (excluding load current)*4

When used standalone

I/O (switchable)

Output (Ch1/Ch2)

Control output: switching NPN/PNP setting
Open collector output: 30 VDC or less, maximum 100 mA/ch or less, residual voltage 2.5 V or less*5

Analog output (Ch2)

4–20 mA / 0–20 mA (switchable), load resistance 260 Ω or less*5

Power voltage

20–30 VDC, ripple (P-P) 10% included; Class2/LPS*5

Protection circuit

Protection against reverse power connection, power supply surges, output short circuits, and output surges*5

Network compatibility


Environmental resistance

Enclosure rating

IP65/IP67 (IEC60529)

Ambient temperature

–10 to +60°C -14 to +140°F (no freezing)

Relative humidity

35–85% RH (no condensation)

Vibration resistance

10–500 Hz; power spectral density: 0.816 G2/Hz; X, Y and Z directions

Shock resistance

100 m/s2 (approx. 10 G), 16 ms pulses, 1000 times each for X, Y and Z directions


Display amplifier

PBT / PAR / POM / SUS303

Sensor head

Head: PPS / SUS303 / Sn; Pipe clamp unit: SUS304; Cable: fluororesin

Display amplifier mounting bracket



Approx. 70 g 2.47 oz

*1 When pipe temperature is 100°C 212°F or more, the display amplifier cannot be mounted on the pipe clamp unit. Install the amplifier so it is insulated from the heat from the pipe.
*2 This is the guaranteed value from verification performed at KEYENCE inspection facilities. Measurement error may occur depending on the type and condition of the customer’s pipes and fluid, the ambient temperature and other factors.
*3 This is the value for a constant 25°C 77°F environment, taking into account absolute error and repeatability.
*4 During standalone use, 220 mA or less including load.
*5 When connecting to a FD-H Series/FI-1000 model, please follow the specifications of the display unit.
*6 Supports IO-Link specification v.1.1/COM2 (38.4 kbps). Setting files can be downloaded from the KEYENCE website (www.keyence.com).
IO-Link is a trademark or registered trademark of PROFIBUS Nutzerorganisation e.V. (PNO).

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