The Parr 6725 Semimicro Oxygen Vessel Calorimeter 230v is designed for precise calorimetric analysis of small samples, using a 22ml oxygen bomb for high accuracy in combustion energy measurement. This compact and robust calorimeter is ideal for applications requiring small sample sizes with excellent precision.
Product Features
- A 22ml Oxygen Bomb: The smallest of all Parr oxygen bombs, handling samples from 25 to 200 mg, liberating up to 1200 calories in oxygen at pressures up to 35 atmospheres. Outputs up to 2400 calories can be achieved with self-oxidizing samples in inert atmosphere, limited to 1200 calories in oxygen combustion.
- Self-sealing 1109 Semimicro Oxygen Bomb with O-ring main seal, inlet/outlet valve for oxygen filling and release, insulated and grounded electrodes for firing.
- Samples held in a shallow nickel alloy dish on an adjustable Inconel loop connected to the oxygen inlet tube; electrical firing circuit connection via central terminal stem.
- Oxygen supplied via Parr 1824 Filling Connection with automatic relief valve for safe filling from commercial oxygen tanks.
- Effective Thermal Jacket: A fully silvered glass Dewar vacuum flask holds the bomb in 460 g of water, inside a removable stainless steel air can surrounded by insulating foam and mounted in a sturdy aluminum case.
- Thermistor probe and stirrer mounted on the calorimeter cover; stirring shaft driven at ~450 rpm by a motor with easily removable drive belt.
- Precise Temperature Measurements via included Parr 6772 Calorimetric Thermometer module.
- Good precision: Deviations less than 1.0% for energy releases under 100 calories, and less than 0.4% for releases around 400 calories.
Applications
- Marine biology and ecological studies requiring analysis of very small sample sizes (25-200 mg).
- Testing of heat powders and pyrotechnic mixtures, especially slow-burning thermites used to produce heat.
- Burning samples with own oxidizers in inert atmosphere or in oxygen for others.
- Note: Not suitable for self-oxidizing samples that produce significant gas, due to high pressure risks.
Benefits
- Enables accurate calorimetric measurement on very small sample sizes, saving valuable sample material.
- Compact and robust design suitable for demanding lab environments.
- Safe and reliable oxygen filling and pressure relief system reduces operator risk.
- Efficient insulation and stirring system improves measurement accuracy and repeatability.
- High precision temperature measurement for reliable data.
Why Choose the Parr 6725 Semimicro Oxygen Vessel Calorimeter?
This calorimeter is an excellent choice for laboratories and researchers requiring precise energy measurements from small samples with exceptional accuracy and reliability. Parr’s innovative design ensures operator safety and ease of use, while delivering consistent, reproducible results, making it indispensable in fields such as marine biology, ecological studies, and materials testing involving pyrotechnics and specialized powders.
