Description

The Fluke 5618B Small Diameter Industrial RTD is designed for high-accuracy temperature measurement in industrial applications. With its small diameter and 316 SST sheath, this probe is ideal for insertion into tight spaces.

Available in three lengths, the 5618B offers flexibility for a variety of applications.

Fluke 5618B Key Features

The Fluke 5618B features a nominal resistance of 100 Ω at 0 °C and a temperature coefficient of 0.003923 Ω/Ω/°C. It has a temperature range of –200 °C to 500 °C and a drift rate of ±0.1 °C when used periodically to 500 °C.

Nominal resistance: 100 Ω at 0 °C
Temperature coefficient: 0.003923 Ω/Ω/°C
Temperature range: –200 °C to 500 °C
Drift rate: ±0.1 °C when used periodically to 500 °C
Sheath material: 316 SST
Leads: 22 AWG PTFE, 6’
Termination: Specify
Hysteresis: Less than 0.01 °C at 0 °C
Time constant: Four seconds maximum
Thermal EMF: Less than 25 mV at 420 °C

Who Needs the Fluke 5618B?

The Fluke 5618B is designed for industrial applications where high-accuracy temperature measurement is critical. This includes use in power plants, chemical processing, and other industries where temperature measurement is essential.

Fluke 5618B Applications

Use in power plants to measure temperature in boilers and turbines.
Measure temperature in chemical processing applications, such as reactors and heat exchangers.
Use in oil and gas applications to measure temperature in pipelines and wells.
Measure temperature in food processing applications, such as ovens and freezers.
Use in HVAC applications to measure temperature in air handlers and chillers.

Why Buy Fluke 5618B from MME?

At MME, we offer the Fluke 5618B Small Diameter Industrial RTD at competitive prices. Our team of experts is available to assist with any questions or concerns you may have.

Fluke 5618B Specifications

Specifications

Resistance

Nominal 100 Ω at 0 °C

Temperature
Coefficient

0.003923 Ω/Ω/ °C nominal

Temperature
Range

–200 °C to 500 °C
(–200 °C to 300 °C for 5618B-6-X)

Drift Rate

± 0.1 °C when used periodically to 500 °C

Sheath Material

316 SST

Leads

22 AWG PTFE, 6’

Termination

Specify

Hysteresis

Less than 0.01 °C at 0 °C when using –196 °C and
420 °C as the end points.

Time Constant

Four seconds maximum for 63.2 % response to
step change in water moving
at 3 fps.

Thermal EMF

Less than 25 mV at 420 °C

Calibration

Includes manufacturer’s accredited
calibration w/ITS-90 coefficients, R vs. T values in
1 °C increments

Size

5618B-12: 305 mm L x 3.2 mm dia. (12 x 1/8 in)
5618B-9: 229 mm L x 3.2 mm dia. (9 x 1/8 in)
5618B-6: 152 mm L x 3.2 mm dia. (6 x 1/8 in)

Calibrated
Accuracy† (k=2)

± 0.026 °C at –200 °C
± 0.066 °C at 0 °C
± 0.219 °C at 500 °C

†Includes
calibration
uncertainty and
drift specification.

Calibration Uncertainty
Temperature	Expanded Uncertainty (k=2)
–196 °C	0.024 °C
–38 °C	0.011 °C
0 °C	0.010 °C
200 °C	0.018 °C
420 °C‡	0.029 °C
Note: Calibration uncertainties depend on the uncertainties of the lab performing the calibration. Subsequent calibrations of this probe performed with different processes, at different facilities, or with changed uncertainty statements may state different uncertainties. †Lab code 200706-0 ‡300 °C for 5618B-6