Description
Peltier Sipper System is a specialized device used in analytical chemistry and biochemistry to precisely control the temperature of liquid samples. It leverages the Peltier effect, which involves the transfer of heat between two electrical junctions when an electric current flows through them, to either heat or cool a sample. Here is a detailed description of its components and functionality:
Components
- Peltier Modules: These are thermoelectric coolers (TEC) that use the Peltier effect to transfer heat. When an electric current passes through the module, one side absorbs heat and becomes cold while the other side releases heat and becomes hot.
- Heat Sinks and Fans: To dissipate the heat generated on the hot side of the Peltier module, heat sinks and fans are used. These components ensure that the system remains efficient and prevents overheating.
- Temperature Sensors: These are used to monitor the temperature of the liquid sample. Common sensors include thermocouples or RTDs (Resistance Temperature Detectors).
- Control Unit: This includes a microcontroller or a dedicated temperature controller that regulates the current flowing through the Peltier module based on feedback from the temperature sensors. This ensures precise temperature control.
- Sample Holder: A container or a set of tubes where the liquid samples are placed. This holder is in thermal contact with the Peltier module to enable efficient heat transfer.
- Sipper Mechanism: This is a mechanism that allows the system to draw (sip) liquid samples from a reservoir into the sample holder for temperature regulation and subsequent analysis.
Functionality
- Temperature Control: The primary function of the Peltier Sipper System is to maintain the liquid samples at a precise temperature. This is crucial in various analytical procedures where temperature can affect the reaction kinetics or the stability of the sample.
- Sipping Action: The system can automatically draw in liquid samples from a reservoir. This is often controlled by a pump or a set of valves that ensure a measured and consistent intake of samples.
- Thermal Regulation: By adjusting the current through the Peltier module, the system can rapidly switch between heating and cooling modes to achieve and maintain the desired temperature. This is particularly useful in processes that require quick temperature cycling.
- Automation: Many Peltier Sipper Systems are integrated with automated analytical instruments such as spectrophotometers, chromatographs, or titrators. The automation allows for high-throughput processing of samples with minimal manual intervention.
Applications
- Spectroscopy: Maintaining sample temperature is vital in spectroscopy to ensure accurate and reproducible measurements.
- Chromatography: In techniques like HPLC (High-Performance Liquid Chromatography), precise temperature control can influence the separation of compounds.
- Biochemical Assays: Many biochemical reactions are temperature-sensitive. The Peltier Sipper System helps in optimizing these reactions by providing a stable thermal environment.
- Pharmaceutical Testing: Ensuring consistent temperature conditions for liquid samples is essential in the development and testing of pharmaceutical products.
Technical specification
1. The valid temperature range is from 15oC to 65oC
2. The valid sampling time range is from 30s to 10min,
3. The valid peristaltic pump speed range is from 1 to 12
4. The sampling speed is about 50ml/min.
5. Power supply is 220±22V@50±1Hz or 110±11V@60±1Hz.
