Identification of the dynamic properties of temperature-sensors in natural and petroleum gas

• Published in: Sensors and actuators. A. Physical. 2002-01, Vol.96 (1), p.1-13
• Main Authors: Cimerman, Franc, Blagojevic, Bogdan, Bajsic, Ivan
• Format: Article
• Language: English
• Subjects: Dynamic properties; Exact sciences and technology; General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Natural gas; Petroleum gas; Physics; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Step response; Temperature-sensor; Thermal instruments, apparatus and techniques; Thermometry; Transfer function
• ISSN: 0924-4247; 1873-3069
• DOI: 10.1016/S0924-4247(01)00759-2

This paper presents a theoretical and experimental investigation of the dynamic properties of contact temperature-sensors in air as well as in natural and petroleum gas. Particularly with gas-supply systems, which can operate either with natural or petroleum gas, a knowledge of a sensor’s dynamic properties and sensitivity to different pressure and velocity conditions can be a crucial factor in the regulation and control of the system. The frequency characteristics of contact temperature-sensors in dynamic processes with air were analysed. The experimental results are presented for real Pt-resistance temperature-sensors, with an evaluation of the time-dependent uncertainty from different uncertainty sources. In real gas-supply systems, strict protective measures and a hazardous environment tend to prevent any standard experimental identification of the dynamic properties of temperature-sensors. This was the reason for our theoretical approach to the identification of the dynamic properties of the investigated temperature-sensors in natural and petroleum gas with the use of a computational calibration model, which was experimentally verified in an air-flow. Our experimental and theoretical investigation has shown that different gas compositions, pressures and velocities in the gas-supply system result in considerable variations which could lead to the applicability of the procedure in evaluating dynamic properties in highly hazardous systems.