LINKAM LNP 93/2 LIQUD NITROGEN COOLING PUMP for stage temperature controller

You are buying used LINKAM LNP 93/2 LIQUD NITROGEN COOLING PUMP for microscope stage temperature controller .This controller was removed from working laboratory, it is cleaned well and been tested by a professional technician, guaranteed to be fully operational.Tubes are not included.

DESCRIPTION:

• The LNP93/2 cooling system is uniquely designed by Linkam. 
• Manual option speed control.
• The precise control of liquid nitrogen flow enables specific stages to be controlled at linear cooling rates as fast as 100°C/min or as slow as 0.01°C/min. 
• The unique design of the LNP93/2 reduces noise and vibration and is automatically controlled by the T93,T94 controller. 
• A cooling system consists of the control unit housing the pumps and a Dewar. 
• The LNP93/2 can be added as an option to several Linkam systems to allow cooling down to < -195°C.

The liquid nitrogen cooling cycle unit mainly uses the evaporation of liquid nitrogen from the cryogenic storage tank to absorb the heat generated by the coil heat exchanger. The generation of nitrogen gas will cause the pressure in the tank to rise sharply.To maintain pressure stability in the tank, it is necessary to promptly discharge the generated low-temperature nitrogen gas. To prevent the gasified low-temperature nitrogen from condensing the water vapor in the air and clogging the exhaust piping during the discharge process, it is necessary to heat the generated low-temperature nitrogen.
The nitrogen exhaust heater as a whole adopts an internal winding resistance wire structure. The nitrogen is divided into 10 regions within the exhaust pipe through a perforated circular plate, with a resistance wire wound in each region. The perforated circular baffle is fixed by suspending a threaded rod from the top. The structure of the perforated circular baffle not only causes the nitrogen to recirculate within the pipe, enhancing heat exchange, but it can also better zone the temperature, increasing the heat exchange area of the nitrogen. A temperature measurement hole is reserved at the outlet of the exhaust pipe, and the exhaust temperature is measured using a temperature sensor. According to the temperature feedback signal, the output power of the silicon-controlled rectifier is adjusted, thereby adjusting the outlet temperature of the nitrogen, realizing intelligent temperature control regulation of the nitrogen discharge device. The silicon-controlled rectifier is installed on the outer pipe of the nitrogen discharge heating device, close to the outlet position. The nitrogen exhaust heater is connected to the top cover of the liquid nitrogen circulation unit by threads.