This publication provides introductory technical guidance for civil engineers, electrical engineers and other professional engineers, construction managers and operation and maintenance managers interested in transducers for instrumentation of concrete structures. Here is what is discussed:1. DESCRIPTION OF THE INSTRUMENTS2. STRAIN METER3. MINIATURE STRAIN METER4. JOINT METER5. STRESS METER FOR CONCRETE6. PORE PRESSURE CELL7. THE REINFORCED CONCRETE METER8. RESISTANCE THERMOMETER9. INSTRUMENT PREPARATION10. WATERPROOFING TREATMENT11. CABLE LEADS12. CALIBRATION CORRECTIONS13. CORRECTION FACTORS14. RESISTANCE THERMOMETER CALIBRATION15. FINAL CALIBRATION ADJUSTMENTS16. INSTRUMENT INSTALLATION17. EMBEDMENT TECHNIQUES.