IKA LR 1000.65 pH electrode holder, for LR 1000, 0004663400
€867.35
% Manufacturer's RRP: €913.00 5% below manufacturer's RRP
- Mechanical holder for pH electrodes
- Gas-tight system integration in the laboratory reactor
- Stabilised against massive rheological shear forces
- Protects fragile glass shafts from breakage
- Precisely fitted for the LR 1000 reactor lid
- Vacuum-compatible and completely hermetic design
- Manufacturer’s part number (MPN): 0004663400 | EAN: 4053411005788
Product information "IKA LR 1000.65 pH electrode holder, for LR 1000, 0004663400"
Hermetic System Integration and Vacuum Architecture
In the chemical process control of complex polymerisations or during the synthesis of high-viscosity emulsions, precise control of the reactor atmosphere is a fundamental thermodynamic prerequisite. The insertion of an analytical pH electrode (such as the IKA LR 1000.64) must under no circumstances compromise the physical isolation of the reaction chamber. The IKA LR 1000.65 pH probe holder acts as a high-precision mechanical adapter to couple the sensor absolutely gas-tight to the standard-threaded lid of the LR 1000 laboratory reactor. The precisely engineered fits and sealing elements of the holder prevent the ingress of atmospheric oxygen during moisture-sensitive reactions carried out under inert gas and ensure that the system vacuum is maintained without interruption during high-speed degassing of viscous media.
Mechanical stabilisation against rheological lateral forces
In addition to providing a thermodynamic seal, the holder fulfils a vital static protective function. Highly viscous, non-Newtonian fluids, in combination with the rotation of heavy anchor stirrers, generate immense tangential and radial flow vectors. These hydrodynamic shear forces exert massive lateral (sideways) pressure on the fragile glass shaft of the pH electrode. The LR 1000.65 holder rigidly secures the electrode in its axial position and completely absorbs the resulting bending moments and mechanical vibrations. This resonance suppression physically prevents catastrophic glass breakage within the reactor, which would inevitably lead to the physical and chemical destruction of the entire batch.
Metrological reproducibility and material integrity
For a metrologically error-free in-situ measurement, the ion-selective membrane of the electrode must remain continuously and precisely within the reactor’s designated fluid-dynamic turbulence zone. The holder allows the immersion depth (Z-axis) to be adjusted with millimetre precision and permanently locks the sensor in place against the hydrostatic buoyancy or suction caused by the agitator. To maintain structural integrity even at the maximum temperatures of 120 °C prevailing in the LR 1000 and to withstand corrosive solvent vapours, all components of the mounting that come into contact with the medium are manufactured from highly chemically inert industrial materials.
Technical details
- Product type: Probe holder / Mechanical sensor adapter
- Process function: Hermetic sealing and static fixation
- Vibration mechanics: Absorbs lateral bending moments and hydrodynamic shear forces
- Compatibility (reactor): Exclusively compatible with IKA LR 1000 lid systems
- Compatibility (sensor): Designed for the IKA LR 1000.64 pH electrode (or 12 mm standard shanks)
- Vacuum compatibility: Ensures the system remains hermetically sealed 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
- Adjustability: Allows for stepless adjustment of the axial immersion depth
Scope of supply
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1 x IKA LR 1000.65 pH probe holder
(Important note: The pH electrode, temperature sensors and the LR 1000 reactor vessel are not included in the scope of delivery!)
Custom requirements & accessories
The probe holder is a purely mechanical bridge component. For analytical operation, it absolutely requires the corresponding IKA LR 1000.64 pH electrode (item no. 0004663300). Continuous metrological recording of the potentials also requires the IKA LR 1000 control base station, as the basic model does not have the necessary electrical sensor infrastructure. Please contact our procurement service at any time for the thermodynamically and statically correct configuration of the sensor system in the reactor lid.
Fits
Scale-up and thermodynamic process control In demanding chemical synthesis, pharmaceutical formulation development and cosmetic polymer processing, the precise reproducibility of thermodynamic and rheological parameters is absolutely essential. The IKA LR 1000 control system is a highly integrated, modular reactor platform that physically simulates the fluid dynamic and thermal behaviour of large-scale industrial production plants on a 1,000-millilitre scale. The system consists of a processor-controlled base station with integrated heating, a borosilicate glass reactor suitable for high vacuum, and high-precision sensor technology. The direct thermal coupling of the heating plate to the reactor base enables a substantial energy input, which heats the medium to precisely defined process temperatures of up to 120 °C. This allows complex endothermic reactions to be carried out or high-molecular-weight resins to be melted under strictly controlled laboratory conditions. Rheology and wall-near mixing kinetics The processing of non-Newtonian, structurally viscous fluids requires specialised mechanical energy input. The system is factory-fitted with the IKA LR 1000.10 anchor stirrer. This stirring element, manufactured from AISI 316L stainless steel, induces immense radial and tangential shear stresses in the medium. The integrated PEEK scrapers continuously abrade the inner wall of the reactor vessel. This kinematics mechanically breaks down the highly insulating thermal boundary layer (hotspots) on the heated glass wall and maximises the convective heat transfer coefficient in matrices with a dynamic viscosity of up to 100,000 mPa·s. To ensure the gentle discharge of these viscous gels and pastes, the reactor vessel (LR 1000.3) included in the set features a dead-space-free bottom drain valve at the lowest point of the vessel. Metrological data acquisition and pH integration The key difference from the “basic” version lies in the metrological superiority of the “control” infrastructure. The base station features a multilingual TFT display which not only controls the rotation speed (10 to 150 rpm) and the heating power, but also acts as a central hub for chemical sensor technology. The system allows the direct connection of pH electrodes for in-situ monitoring of acid-base reactions. The temperature at the core of the medium is simultaneously recorded by the supplied PT 100.30 sensor. An integrated weighing algorithm also continuously measures changes in the torque trend of the stirring mechanism, enabling highly precise, indirect real-time analysis of increases in viscosity (for example, during polymerisation processes). Vacuum architecture and digital system integration Control of the reactor atmosphere is essential for the bubble-free degassing of emulsions or for moisture-sensitive reactions. The system is designed for hermetically sealed vacuum operation. Standard-threaded ports (NS 14 and NS 29) in the lid allow for the gas-tight insertion of sensors and the connection of vacuum pumps or inert gas lines. For certified laboratories (GLP/GMP), the “control” system offers seamless digital traceability. The integrated USB and RS-232 interfaces allow the entire reactor to be connected to a PC in a tamper-proof manner. Using the IKA labworldsoft software, complex temperature and speed ramps can be programmed, and all metrological measurement data (temperature, pH value, torque) can be archived with precise time stamps for official QM audits. Technical details Maximum working volume: 1000 ml Max. operating temperature of the product: 120 °C Viscosity limit: 100,000 mPa·s Rotational speed range: 10 – 150 rpm Torque trend measurement: Integrated for rheological monitoring Temperature measurement: Integrated (including PT 100.30 sensor) pH measurement: Connection for external pH electrode provided (BNC) Vacuum compatibility: System is approved for vacuum operation Product discharge: Via a bottom-mounted drain valve (LR 1000.3) Display: High-resolution TFT display for process visualisation Materials (in contact with the medium): Borosilicate glass 3.3, stainless steel 1.4404, PEEK, PTFE, FFPM Interfaces: USB, RS 232 (compatible with IKA labworldsoft) Permissible ambient temperature: 5 – 40 °C Protection class (according to DIN EN 60529): IP 21 Scope of delivery 1 x IKA LR 1000 control base station 1 x IKA LR 1000.3 laboratory reactor vessel (with bottom drain valve) 1 x IKA LR 1000.10 anchor stirrer (with PEEK scrapers) 1 x IKA PT 100.30 temperature probe 1 x sensor cable (for pH and temperature) 1 x USB cable for data logging 1 x Detailed operating instructions Customised requirements & accessories The LR 1000 control system is supplied as a fully functional complete package. However, to upgrade it to a fully automated synthesis unit, we recommend the following process-related additions: To record acid-base titrations, a separate pH electrode with a BNC connector is required. For bubble-free dispersion under high vacuum, you will also require the LR 1000.41 shaft holder in combination with a T 25 digital LR drive. Please contact our procurement service at any time regarding the complex software integration (IKA labworldsoft) and the fluid dynamics configuration of your specific reactor.