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Eg&g ortec 729A liquid nitrogen level monitor module
Ortec 729A Liquid Nitrogen Level Monitor NIM BIN Module Used
EG&G Ortec 729A Liquid Nitrogen Level Monitor Module Used
The ORTEC Model 729A Liquid Nitrogen Level Monitor Module is a single-width module (NIM-standard) designed to serve as an accessory on HPGe coaxial (GEM and GMX), LEPS, Si(Li), and old Ge(Li) detectors in the field.
When used with the appropriate probe, the monitor will sound an alarm long before the detector can warm up as a result of loss of liquid nitrogen in the dewar. The level of liquid nitrogen is sensed by a thermistor probe in the dewar. When the liquid nitrogen falls below a safe level (approximately 1/4 of the dewar capacity), an alarm sounds and a red light on the front panel of the control module flashes a warning.
