Description
Chiller Dewar
Micromeritics’ Chiller Dewar is a closed loop recirculating system that utilizes a high surface area copper coil to provide excellent heat transfer between the dewar and the recirculating liquids. Temperature control is provided through Fan external recirculating bath or chiller bath which are supplied as accessory items.
The Chiller Dewar is easily mounted to the system’s elevator using the supplied clamping screw and bar set. The unit comes complete with all necessary fittings and tubing for connection to the recirculating bath. An external RTD is also provided which mounts inside the dewar. The RTD connects to the recirculating bath and ensures that precise temperature control is maintained over the course of the experiment.
| Temperature Range | -50 °C to 200 °C* |
|---|---|
| Temperature Stability | +/- 0.01 °C |
Refrigerated / Heating Circulators
FP25-ME These units provide efficient heating/cooling. With Active Cooling Control to +200 °C ‚ this model offers proportional cooling control to ensure energy-saving performance and reduce heat generation.
| Temperature Range | -28 °C to +200 °C |
|---|---|
| Temperature Control | PID, cascade |
| Temperature Stability | +/- 0.01 °C |
CryoCooler II
Micromeritics’ CryoCooler II accessory for our AutoChem series provides temperature control from -100 to +1100 °C. The device permits ramping temperatures at rates from 5 to 50 °C/minute, selectable in 1 °C increments. The CryoCooler II seamlessly transitions from sub-ambient to ambient operation. A source of LN2 is directly attached to an AutoChem furnace for rapid cooling and cycling of the furnace.
| Temperature Range | -100 °C to 1100 °C* |
|---|
Cryostat I
The Micromeritics Cryostat I is a closed-cycle cryocooler based on the Gifford-McMahon (GM) refrigeration principle. It uses helium gas from a helium compressor to generate cryogenic temperatures. The refrigeration effect of the GM cooler results from a series of thermodynamic processes acting on the helium gas that includes: charging and compression, displacement and heat exchange with the regenerator, expansion and heat absorption (cooling effect).
The Cryostat I eliminates the need for liquid nitrogen and can obtain temperatures below the 77 K of liquid nitrogen. The unit is mounted on the Micromeritics instrument with a specially designed fixture. The cold head of the device is positioned at the unit to maintain precise temperature control of the sample tubes. The Cryostat I’s cold head is then connected to a floor mounted compressor.
| Temperature Range | 25 to 350K |
|---|---|
| Temperature Stability | +/- 0.005K |
| Nitrogen Reservoir | closed-cycle helium |
| Cool Down time to Stated Minimum from Ambient | 60 minutes |
Iso Controller
Micromeritics’ ISO Controller utilizes thermoelectric cooling based on the Peltier principle. The unit is designed to maintain a constant temperature between 0 °C and 80 °C when using CO2, N2, and other gases for adsorption analysis. The device rapidly cools and efficiently maintains temperature with minimal electrical current required.
The sample area will accommodate up to 3 sample tubes. Heat removal is uniform and accurate when the unit is used with an appropriate liquid (ambient water or liquid antifreeze). The dewar section is placed on the instrument dewar elevator and then raised into position for analysis.
| Temperature Range | – 5 °C to 75 °C (lab temp <27 °C) |
|---|---|
| Cooling Capacity | Approx. 80W at 0 °C, 120W at 25 °C |
| Minimum Controllable Resolution | 0.1 °C |
| Temperature Stability | ±0.1 °C |
