RTD temperature sensor 5618B

Pt100resistanceplatinum resistive

Product overview
The 5618B is a small-diameter industrial RTD designed for laboratory and industrial calibration tasks. Each probe is supplied with a manufacturer's NVLAP-accredited calibration report including ITS-90 coefficients and R vs. T values in 1 °C increments for direct use with Fluke Calibration readouts and other precision thermometry equipment.

Key features

• Secondary-level performance with full ITS-90 accredited calibration (NVLAP lab code 200706-0).
• 3.2 mm (0.125 in) sheath diameter for faster response with maintained precision.
• Wide temperature range: −200 °C to 500 °C (5618B-6-X limited to 300 °C).
• Optimized for short-immersion applications by minimizing heat flow between ambient and sensor.
• Recommended readouts: 1523, 1524, 1502A, 1529, 1560.

Models and termination options

• 5618B SDI RTD — base designation for the small-diameter industrial RTD.
• 5618B-12-X — 305 mm (12 in) probe length, 6 ft lead; X = termination code.
• 5618B-9-X — 229 mm (9 in) probe length, 6 ft lead; X = termination code.
• 5618B-6-X — 152 mm (6 in) probe length, 6 ft lead; X = termination code (max 300 °C for this model).
• Termination options (specify X): A (INFO-CON for 914X), B (bare wire), D (5-pin DIN), G (gold pins), J (banana plugs), L (mini spade lugs), M (mini banana plugs), P (INFO-CON for 1523/1524), S (spade lugs).

Specifications

• Resistance: nominal 100 Ω at 0 °C.
• Temperature coefficient: nominal 0.003923 Ω/Ω/°C.
• Temperature range: −200 °C to 500 °C (5618B-6-X to 300 °C).
• Calibrated accuracy (k=2): ±0.026 °C at −200 °C; ±0.066 °C at 0 °C; ±0.219 °C at 500 °C.
• Calibration uncertainty (expanded, k=2) examples: −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 (300 °C for 5618B-6).
• Drift rate: ±0.1 °C when used periodically to 500 °C.
• Sheath material: 316 stainless steel; sheath diameter: 3.2 mm (0.125 in).
• Leads: 22 AWG PTFE, 6 ft (approx. 1.83 m).
• Time constant: ≤ 4 s for 63.2% response in water moving at 3 fps.
• Thermal EMF: < 25 mV at 420 °C.
• Includes: Manufacturer's NVLAP-accredited calibration report with ITS-90 coefficients and R vs. T table (1 °C increments).

Calibration & resources

• Includes accredited calibration report (NVLAP lab code 200706-0) and ITS-90 coefficients for direct input to compatible readouts.
• Recommended for calibrating Fluke Calibration infrared blackbody sources (9132, 9133) and as a stable PRT in calibration labs.
• Available documentation: user manual, data sheets, statement of memory volatility.