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Methods for measurement of Fluid flow in closed conduits, using tracers - Part 1: Measurement of water flow - Section 1.4 Transit time method using non-radioactive tracers. Original standard BS 5857-1.4-1980 (2008) ISO 2975-VI-1977 in PDF full version. Additional info + preview on request

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Methods for measurement of Fluid flow in closed conduits, using tracers - Part 1: Measurement of water flow - Section 1.5 Transit time method using radioactive tracers. Original standard BS 5857-1.5-1980 (2008) ISO 2975-VII-1977 in PDF full version. Additional info + preview on request

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Methods for measurement of Fluid flow in closed conduits, using tracers - Part 2: Measurement of gas flow - Section 2.1 General. Original standard BS 5857-2.1-1980 (1999) ISO 4053-I-1977 in PDF full version. Additional info + preview on request

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Methods for measurement of Fluid flow in closed conduits, using tracers - Part 2: Measurement of gas flow - Section 2.4 Transit time method using radioactive tracers. Original standard BS 5857-2.4-1980 (1999) ISO 4053-IV-1978 in PDF full version. Additional info + preview on request

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Method for measuring the efficiency of hydraulic turbines, storage pumps and pump-turbines (thermodynamic method). Original standard BS 5860-1980 (1999) IEC 607-1978 in PDF full version. Additional info + preview on request

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Installation and maintenance of gas-fired ducted air heaters of rated heat input not exceeding 70 kW net (2nd and 3rd family gases). Specification. Original standard BS 5864-2019 in PDF full version. Additional info + preview on request

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