Fluke Calibration 5618B-12-M Secondary PRT Probe
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Fluke Calibration 5618B-12-M is a secondary-standard Platinum Resistance Thermometer probe with 12-inch immersion, NIST-traceable ITS-90 calibration, and mini banana plug termination.
Product details
| Model | 5618B-12-M |
| Manufacturer | Fluke Calibration |
| Category | Temperature Probes & Sensors |
| Availability | Made to order |
Description
Overview
The Fluke Calibration 5618B-12-M is a secondary-standard Platinum Resistance Thermometer (PRT) probe engineered for precision temperature measurement and calibration in laboratory and industrial environments. With a compact 3.2 mm diameter sheath and 12-inch immersion depth, it combines accuracy with practical dimensions for various measurement scenarios. Each probe includes NVLAP-accredited calibration with ITS-90 coefficients traceable to NIST standards.
Key Features
- Secondary-level performance with full ITS-90 calibration and NIST traceability
- Small diameter sheath (3.2 mm) minimizes heat conduction errors at shallow immersion depths
- 316 stainless steel construction for durability and corrosion resistance
- Temperature range from -200°C to 500°C with excellent long-term stability
- Mini banana plug termination for flexible instrument compatibility
- NVLAP-accredited calibration with ITS-90 coefficients and R vs. T values in 1°C increments
Applications
- Industrial and laboratory temperature measurement and calibration
- Calibration of infrared blackbody calibrators and heat sources
- Precision temperature monitoring where stability and accuracy are critical
- Short immersion depth applications requiring compact probe design
Included Accessories
- NVLAP-accredited calibration report with ITS-90 coefficients and R vs. T values in 1°C increments
Specifications
| Sensor Type | Platinum Resistance Thermometer (PRT) |
| Resistance at 0°C | Nominal 100 Ω |
| Temperature Coefficient | 0.003923 Ω/Ω/°C |
| Temperature Range | -200°C to 500°C |
| Probe Length | 305 mm (12 in) |
| Sheath Diameter | 3.2 mm (0.125 in) |
| Sheath Material | 316 Stainless Steel |
| Lead Wire | 22 AWG Teflon-insulated, 6 ft |
| Stability/Drift Rate | ±0.1°C when used periodically to 500°C |
| Hysteresis | Less than 0.01°C |
| Time Constant | 9 seconds maximum (63.2%) |
| Thermal EMF | Less than 25 mV at 420°C |
| Calibration Standard | NVLAP-accredited, ITS-90, -200°C to 500°C |
| Termination Type | Mini banana plugs |
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Fluke Calibration 5618B-12-M Secondary PRT Probe
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