IKA LR 1000.61 Probe holder, for LR 1000, 0004664400

Thermodynamic system integration and absolute hermetic sealing

In chemical reaction engineering and the control of high-viscosity polymerisation processes, the precise in-situ measurement of the reaction temperature is crucial for process reliability and kinetics. In order to insert a metrological temperature sensor (such as the PT 100.30) directly into the core of the reaction medium, the physical barrier of the reactor must be breached. The IKA LR 1000.61 sensor holder acts as a static bridge element, connecting this sensor system in an absolutely gas-tight manner to the standard-threaded ports of the LR 1000 reactor lid. The geometrically precise seal fits ensure that the vacuum is not compromised during high-speed degassing of viscous matrices. At the same time, the uncontrolled inflow of atmospheric oxygen during moisture-sensitive reactions (under an inert gas atmosphere) is physically and completely prevented.

Metrological Z-axis calibration

To ensure representative thermodynamic mapping of the reactor, the sensor’s measuring tip must not remain within the thermal boundary layer of the temperature-controlled reactor wall or in a fluid dynamic dead zone. The design of the LR 1000.61 mounting allows for stepless adjustment of the axial immersion depth (Z-axis) of the inserted sensor. The user can position the sensor with millimetre precision within the fluid core, where the mixing kinetics are highest due to the agitators. The mechanical clamping mechanism then permanently secures the sensor’s stainless steel shaft, preventing axial displacement caused by hydrostatic pressure or the suction generated by the agitator.

Mechanical vibration damping and structural integrity

High-viscosity, structurally viscous media generate massive tangential flow resistance and high-frequency vibrations when large anchor agitators rotate. These hydrodynamic loads transmit lateral bending moments to the long, thin shaft of the temperature sensor. The LR 1000.61 mounting fixture rigidly secures the sensor in place and absorbs these lateral shear forces. This protects the sensitive platinum resistance structure (PT 100) inside the sensor from microscopic cable breaks or mechanical vibrations that could cause it to lose calibration. All components of the mounting that come into contact with the medium are made from highly chemically resistant materials to withstand corrosive solvent vapours at temperatures of up to 120 °C over the long term.

Technical details

• Product type: Probe holder / Mechanical sensor adapter
• Process engineering function: Gas-tight integration and static fixation
• Metrological benefit: Stepless adjustment of the axial immersion depth
• Vibration mechanics: Absorbs lateral hydrodynamic flow forces
• Compatibility (reactor): Exclusively suitable for IKA LR 1000 lid systems
• Compatibility (sensor): Designed for slim probes (such as PT 100.30)
• Vacuum compatibility: Guarantees absolute system hermeticity during evacuation
• Thermodynamic resistance: Designed for reactor temperatures up to 120 °C
• Installation: Form-fit mounting in the standard-threaded ports of the reactor lid

Scope of supply

• 1 x IKA LR 1000.61 probe holder

(Important note: The temperature probe and the LR 1000 reactor vessel are not included in the scope of delivery!)

Custom requirements & accessories

The LR 1000.61 holder is a purely mechanical locking component. To enable thermodynamic monitoring within the reactor, the use of the appropriate IKA PT 100.30 temperature probe is essential. This probe is guided precisely through the holder and connected to the IKA LR 1000 base station to control the heating power in real time based on the metrological in-situ data. Please contact our specialist procurement service at any time for a thermodynamically and mechanically fault-free configuration of your reactor sensor system.