法国ARELCO（阿莱尔科）公司是法国制造气体分析和取样仪器的厂商，用于气体的制造和燃烧的控制：氧气，H2, CO, CO2 和 H2O分析仪；ARELCO石油产品物理性能分析仪；ARELCO热量计和Wobbe测量仪；灰尘，细菌，有毒气体取样仪。

The oxygen analyzer ARELCO ARC models ZOA 100 use a zirconium oxide detector with gaseous distribution. This technique allows to insure a continuous operation, or intermittent, with a reduced maintenance at least.
The ZOA 100, in all its versions, addresses the demanding applications.
The oxygen analyser from ARELCO A.R.C. model TOA MP - R integrates a maintenance free sealed electrochemical sensor and a complete new microprocessor electronics.
Main technical specifications :
Measurement principle: electrochemical sensor
Accuracy* : +/- 1 % of selected full scale
+/- 0.2 % between 0 and 10 ppm
Response time : T95 < 20 sSensor : temperature monitored at +40°C
Inlet pressure : 1 bar max