JBC Tools PH218 | Type K Thermocouple | PCB Temperature Measurement | Preheater & Hot Air StationThe JBC PH218 is a Type K thermocouple designed for precise PCB surface temperature measurement when working with JBC preheaters, hot air rework stations, and the JBC TID Digital Thermometer. The PH218 reads the temperature at a specific point on the PCB, allowing technicians to accurately monitor and manage temperature profiles during reflow, rework, and preheating operations — critical for protecting heat-sensitive components and ceramic chip passives (MLCC) from thermal shock. The ultra-fine 0.2mm PFA-insulated wire minimizes thermal mass at the measurement point for accurate readings. ESD safe. Kapton tape is recommended to secure the thermocouple to the PCB during measurement.Key Specifications Specification Value Part Number / SKU PH218 Type Thermocouple Type K Temperature Range -70 to 250°C / -94 to 482°F Wire Insulation PFA Wire Diameter Ø 0.2mm (2×) / 0.008 in × 0.008 in (2×) Wire Length 1 m / 39.37 in ESD Safe Yes Net Weight 12 g (0.03 lb) Package Dimensions 110 × 80 × 40 mm Brand JBC Tools Compatible Equipment JBC Preheaters — PHNE, PHSE, PHBE, PHXLE series preheater sets JBC Hot Air Stations — all JBC hot air rework stations with temperature profile monitoring JBC TID Digital Thermometer — direct compatibility for standalone PCB temperature measurement JBC DME Control Units — when used with preheater accessories in the DME station ecosystem Key Features Type K thermocouple for PCB temperature profiling — reads surface temperature at a specific PCB point to monitor and manage temperature profiles during preheating, reflow, and hot air rework operations Ultra-fine 0.2mm PFA wire — minimal thermal mass at the measurement point for accurate, fast-responding temperature readings without disturbing the PCB thermal profile -70 to 250°C range — covers the full operating range for PCB preheating and rework processes including lead-free reflow profiles ESD safe construction — safe for use in ESD-sensitive electronics work environments Kapton tape compatible — JBC recommends securing the thermocouple to the PCB with Kapton tape for stable, accurate readings during profiling operations Frequently Asked QuestionsWhat is the PH218 used for and why is PCB temperature measurement important?The PH218 measures the actual surface temperature at a specific point on the PCB during preheating or hot air rework operations. This is critical for two reasons: (1) preventing thermal shock to heat-sensitive components like MLCC ceramic capacitors, which can crack if the temperature ramp is too fast, and (2) ensuring the PCB reaches the target soak temperature before reflow. Without a thermocouple, you’re relying on the station’s air temperature reading, which may differ significantly from the actual PCB surface temperature.Which JBC stations and equipment is the PH218 compatible with?The PH218 is compatible with all JBC preheater sets (PHNE, PHSE, PHBE, PHXLE series), JBC hot air rework stations, and the JBC TID Digital Thermometer for standalone measurement. It also works within the JBC DME station ecosystem when used alongside preheater accessories.How do I attach the PH218 to the PCB for accurate readings?JBC recommends securing the thermocouple tip to the PCB surface using Kapton (polyimide) tape. Place the thermocouple junction directly on the pad, component body, or board area you want to monitor, and use a small piece of Kapton tape to hold it flat against the surface. Good thermal contact between the junction and the PCB surface is essential for accurate readings.What is the temperature range of the PH218 and is it suitable for lead-free processes?The PH218 measures from -70 to 250°C / -94 to 482°F. Lead-free reflow processes typically peak at 245°C, so the PH218’s 250°C maximum is at the edge of lead-free reflow temperatures. It is suitable for monitoring board soak temperatures during preheating (typically 100–180°C for lead-free) where accurate profiling is most critical.Can the PH218 be used with non-JBC thermometers or data loggers?The PH218 is a standard Type K thermocouple with PFA-insulated leads, which is the most common thermocouple type. It is physically compatible with any Type K-compatible thermocouple input — handheld thermometers, data loggers, and benchtop instruments. JBC does not guarantee performance specifications when used with non-JBC equipment, but the standard Type K output makes it broadly compatible.
