溴化锂（LiBr）吸收式制冷机必须在接近溴化锂结晶温度和质量分数（浓度）的条件下运行，以实现最高效率。可以通过测量随浓度变化的二次特性（包括折射率、声速、介电常数、导电率/电阻率、电磁辐射吸收和传输以及磁性）的传感器监测LiBr质量分数，以确定何时接近结晶点。最近的一个项目对溴化锂二级性能的可用性进行了分类和确定，并评估了当前的传感器技术。评估了性能/传感器组合的成本、质量分数精度、可用性、可靠性、添加剂的影响和数据可用性，并对每个传感器的可行性进行了总体评估。 虽然没有传感器被评为优秀，但五个传感器（超声波浓度分析仪、光纤折射仪、电导率仪、特定离子检测器和科里奥利密度计）被评为最有潜力的传感器。单元:双引文:研讨会，ASHRAE交易，第105卷，第。1.

Lithium bromide (LiBr) absorption chillers must be operated close to the temperature and mass fraction (concentra-tion) at which lithium bromide crystallizes in order to achieve the highest efficiencies. It may be possible to monitor the LiBr mass fraction by sensors that measure secondary properties that vary with concentration - including the index of refraction, speed of sound, dielectric constant, electrical conductivity/ resistivity, electromagnetic radiation absorption and transmission, and magnetic properties - to determine when the crystallization point is being approached. A recent project categorized and determined the availability of LiBr secondary properties and assessed current sensor technologies. Property/ sensor combinations were evaluated for cost, mass frac-tion accuracy, availability, reliability, effects of additives, and data availability, and an overall rating of the feasibility of each sensor was made. While no sensor was rated outstanding, five sensors (an ultrasonic concentration analyzer, a fiber optic refractometer, an electrical conductivity meter, a specific ion detector, and the Coriolis density meter) were rated as having the most potential.Units: Dual