HollySys Type K Thermocouple with PT100 RTD Probe Options

Engineered for severe process environments, the HollySys Type K Thermocouple with PT100 RTD Probe Options provides precise temperature measurement under intense thermal and mechanical stress. Designed with a solid drilled thermowell protecting against up to 30 MPa pressure, this sensor delivers stable thermal data for critical industrial monitoring loops.

Industrial temperature measurement in harsh process environments frequently encounters extreme mechanical stress, intense fluid velocity, and corrosive media that compromise standard thin-walled sensors. The HollySys Type K Thermocouple with PT100 RTD Probe Options resolves these severe application challenges by utilizing a robust, heavy-duty drilled protection tube designed to withstand high pressure up to 30 MPa and aggressive chemical attack. Operating within the temperature detection architecture, this dual-element or single-element sensor interfaces directly with distributed control systems and field transmitters via standardized terminal connections. It captures high-integrity thermal energy fluctuations and converts them into reliable electrical millivolt or resistance signals. Engineers deploy this instrumentation in the process and control layer of heavy industrial facilities to maintain operational safety, optimize thermal efficiency, and prevent catastrophic equipment overheating.

Technical Specifications

Product Type: Thermocouple and RTD Probe Assembly @ Process Line

Available Calibrations: Thermocouple R, S, B, J, T, E, K, N; RTD PT100, PT1000, Cu50, Cu100 @ Ambient 20°C

Accuracy Class: Class I / Class A @ 25°C Reference

Process Connection: Fixed Thread, Movable Thread, Movable Flange, Fixed Flange, Direct Welding, Custom Configuration @ Pipe Joint

Protection Tube Diameter: 16 mm @ Standard Design

Protection Tube Material: 316L Stainless Steel (Customizable) @ Operating Condition

Explosion-Proof Rating: Ex db IIC T1 to T6 Gb @ Hazardous Area

Maximum Pressure Rating: 30 MPa @ 20°C Test Condition

Thermal Response Time: Short response time design minimizing dynamic error @ Fluid Flow

Resistance Element: Imported thin-film resistance element @ RTD Circuit

System Integration and Hardware Setup

Integrating this temperature assembly into an industrial control framework requires careful attention to electrical signal transmission and mechanical mounting integrity. Field technicians must mount the probe using appropriate threaded or flanged connections, ensuring the drilled thermowell is fully immersed into the media flow without inducing excessive mechanical vibration. For wiring, engineers should utilize shielded twisted-pair extension cables matching the specific thermocouple calibration or RTD configuration to minimize electromagnetic interference from nearby variable frequency drives or high-voltage power lines. The cable shield must be grounded at a single point, typically at the control room grounding bus, to eliminate ground loops and erratic signal fluctuations. Proper terminal block tightening inside the connection head prevents high-resistance contact points that introduce measurement errors into the 4-20 mA loop or digital input card.

Reliability and Environmental Durability

Designed for continuous operation in aggressive industrial settings, this sensor features exceptional structural resilience against high-velocity media impact, heavy mechanical vibration, and corrosive chemical agents. The solid drilled 316L stainless steel protective sheath offers superior resistance to pitting and stress corrosion cracking under extreme pressures up to 30 MPa. Certified with an explosion-proof rating of Ex db IIC T1 to T6 Gb, the assembly safely operates within hazardous atmospheres containing explosive gases and vapors. The internal thin-film resistance elements and mineral-insulated thermocouple cores are packed tightly with high-purity magnesium oxide powder, ensuring high dielectric strength and structural stability against thermal shock. This rugged construction delivers an extended Mean Time Between Failures, minimizing unscheduled maintenance shutdowns across demanding processing plants.

Selection Guidance and Alternative Options

Selecting the correct temperature sensor requires evaluating process parameters such as operating temperature extremes, chemical compatibility, pressure limits, and response time requirements. When configuring a measurement loop, engineers can choose between thermocouples for ultra-high temperature ranges and PT100 RTD elements for high-precision, lower-range tracking. Beijing Zhongping Technology provides comprehensive technical support and expert consultation to assist engineering teams with cross-reference matching, custom stem length design, and localized replacement inventory. Maintenance personnel can also evaluate alternative calibration types such as Type J or Type N depending on the specific reductive or oxidative nature of the monitored atmosphere.

Frequently Asked Questions (FAQ)

1. What is the standard delivery timeline and local stock availability for this sensor?

Beijing Zhongping Technology maintains an extensive inventory of standard HollySys temperature assemblies to support rapid dispatch and minimize operational downtime for regional industrial clients.

2. What warranty coverage and RMA procedures apply to these temperature probes?

Every unit is backed by a comprehensive 12-month manufacturing warranty, and Beijing Zhongping Technology provides streamlined RMA support including pre-shipment quality verification and rapid local replacement services.

3. What are the electrical wiring requirements for minimizing electromagnetic interference?

Field wiring must utilize shielded twisted-pair cables matched to the specific thermocouple or RTD type, with the shield grounded at a single reference point to prevent signal noise from nearby power lines.

4. What maximum pressure and temperature thresholds can this assembly withstand?

The robust drilled protective sheath handles operating pressures up to 30 MPa while supporting wide temperature detection ranges defined by the chosen thermocouple or PT100 element specification.

5. How does the explosion-proof rating affect installation in hazardous plant areas?

The Ex db IIC T1 to T6 Gb rating certifies the connection head and housing for safe deployment in explosive gas atmospheres, provided that certified cable glands are correctly installed and sealed.

6. What mechanical installation practices ensure accurate thermal response?

Install the probe so that the thermowell tip rests in the center of the media flow stream with an insertion depth of at least ten to fifteen times the outer diameter to eliminate stem conduction losses.

7. What routine maintenance checks are recommended for long-term operational reliability?

Periodically inspect the terminal head connections for tightness, verify insulation resistance between the conductors and the sheath, and check the exterior thermowell surface for signs of chemical erosion or mechanical wear.

8. Are custom stem lengths and special process connection flanges available for retrofits?

Yes, protection tube diameters, insertion lengths, and mounting flange configurations can be fully customized to match existing plant nozzle dimensions and legacy installation footprints.