Measuring and Monitoring Systems Items 1 - 96 de 102 ⍾ Weidmüller ⍾ Última modificación Jun 1, 2026 Current transformer Energy / Data Logger Energy Analyser Energy Meter Measuring and Monitoring Systems Accessories Retrofit energy solutions Measuring and Monitoring Systems ⍾ Página 1 « Anterior 12 » Siguiente Detalles Añadir a SDC CMA-101-2500-5A-10VA-0,5 Primary current: 2500 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-101-2500-5A-10VA-1 Primary current: 2500 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-100-5A-2,5VA-1 Primary current: 100 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-125-5A-2,5VA-0,5 Primary current: 125 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-150-5A-2,5VA-0,5 Primary current: 150 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-150-5A-5VA-1 Primary current: 150 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-200-5A-2,5VA-0,5 Primary current: 200 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-200-5A-5VA-1 Primary current: 200 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-250-5A-5VA-0,5 Primary current: 250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-250-5A-5VA-1 Primary current: 250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-300-5A-5VA-0,5 Primary current: 300 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-400-5A-5VA-0,5 Primary current: 400 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-400-5A-5VA-1 Primary current: 400 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-500-5A-5VA-0,5 Primary current: 500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-500-5A-5VA-1 Primary current: 500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-3151-100-AO-24DC-05 Primary current: 100 A, Output: 0(4)-20 mA, 0(2)-10 V, Load: 1 VA Detalles Añadir a SDC CMA-3151-250-AO-24DC-05 Primary current: 250 A, Output: 0(4)-20 mA, 0(2)-10 V, Load: 1 VA Detalles Añadir a SDC CMA-3151-500-AO-24DC-05 Primary current: 500 A, Output: 0(4)-20 mA, 0(2)-10 V, Load: 1 VA Detalles Añadir a SDC CMA-31-600-5A-5VA-0,5 Primary current: 600 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-600-5A-5VA-1 Primary current: 600 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-60-5A-1,25VA-1 Primary current: 60 A, Secondary current max.: 5 A, Load: 1.25 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-750-5A-5VA-0,5 Primary current: 750 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-31-750-5A-5VA-1 Primary current: 750 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-31-75-5A-2,5VA-1 Primary current: 75 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-41-1000-5A-5VA-0,5 Primary current: 1000 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-41-1000-5A-5VA-1 Primary current: 1000 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-51-1250-5A-5VA-0,5 Primary current: 1250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-51-1250-5A-5VA-1 Primary current: 1250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-61-1500-5A-5VA-0,5 Primary current: 1500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-61-1500-5A-5VA-1 Primary current: 1500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-81-2000-5A-10VA-0,5 Primary current: 2000 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 0,5, closed current transformer Detalles Añadir a SDC CMA-81-2000-5A-10VA-1 Primary current: 2000 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-CTM-7-32-1A-02VA-1 Primary current: 32 A, Secondary current max.: 1 A, Load: 0.2 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-CTM-7-50-1A-0.4VA-1 Primary current: 50 A, Secondary current max.: 1 A, Load: 0.4 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-CTM-7-64-1A-0.5VA-1 Primary current: 64 A, Secondary current max.: 1 A, Load: 0.5 VA, Tolerance class: 1, closed current transformer Detalles Añadir a SDC CMA-CTM-7-SNAP-ON 2525160000 Detalles Añadir a SDC CMA-RCM-DACT-120 Residual current transformer, Primary current: 25 A, Round conductor: 120.00 mm, closed current transformer Detalles Añadir a SDC CMA-RCM-DACT-20 Residual current transformer, Primary current: 25 A, Round conductor: 20.00 mm, closed current transformer Detalles Añadir a SDC CMA-RCM-DACT-35 Residual current transformer, Primary current: 25 A, Round conductor: 35.00 mm, closed current transformer Detalles Añadir a SDC CMA-RCM-DACT-60 Residual current transformer, Primary current: 25 A, Round conductor: 60.00 mm, closed current transformer Detalles Añadir a SDC EM-CONNECTIVITY-BOX 144 Protection degree: IP42, Housing main material: Plastic Detalles Añadir a SDC EM-CONNECTIVITY-BOX 96 Protection degree: IP54, Housing main material: Aluminium Detalles Añadir a SDC EM-CONNECTIVITY-BOX TS Protection degree: IP65, Housing main material: Aluminium Detalles Añadir a SDC ENERGY ANALYSER 550-230 2425500000 Detalles Añadir a SDC ENERGY ANALYSER 550-24 2602580000 Detalles Añadir a SDC ENERGY ANALYSER 750-230 2534130000 Detalles Añadir a SDC ENERGY ANALYSER 750-24 2534160000 Detalles Añadir a SDC ENERGY ANALYSER D550-230 2425510000 Detalles Añadir a SDC ENERGY ANALYSER D550-24 2489780000 Detalles Añadir a SDC ENERGY LOGGER D550 2425520000 Detalles Añadir a SDC ENERGY LOGGER S0 MODULE 2446170000 Detalles Añadir a SDC ENERGY METER 330 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 350 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 520-230 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 520-24 Supply voltage: 24 V Detalles Añadir a SDC ENERGY METER 525-230 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 525-24 Supply voltage: 24 V Detalles Añadir a SDC ENERGY METER 610-230 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 610-24 Supply voltage: 24 V Detalles Añadir a SDC ENERGY METER 610-PB-230 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 610-PB-24 Supply voltage: 24 V Detalles Añadir a SDC ENERGY METER 700-PN-230 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 700-PN-24 Supply voltage: 24 V Detalles Añadir a SDC ENERGY METER 750-230 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER 750-24 Supply voltage: 24 V Detalles Añadir a SDC ENERGY METER BRACKET B1 2433040000 Detalles Añadir a SDC ENERGY METER BRACKET L1 2433060000 Detalles Añadir a SDC ENERGY METER BRACKET L2 2433050000 Detalles Añadir a SDC ENERGY METER BRACKET S1 2433080000 Detalles Añadir a SDC ENERGY METER BRACKET S2 2433070000 Detalles Añadir a SDC ENERGY METER CLIPS 2433090000 Detalles Añadir a SDC ENERGY METER D370-CBM Supply voltage: Detalles Añadir a SDC ENERGY METER D650 Supply voltage: 230 V Detalles Añadir a SDC ENERGY METER FIXING SET 2433030000 Detalles Añadir a SDC ENERGY METER SEAL L144 2495630000 Detalles Añadir a SDC ENERGY METER SEAL L96-1 2495640000 Detalles Añadir a SDC ENERGY METER SEAL L96-2 2495610000 Detalles Añadir a SDC KCMA-18-100-1A-1,25VA-3 Primary current: 100 A, Secondary current max.: 1 A, Load: 1.25 VA, Tolerance class: 3, detachable current transformer Detalles Añadir a SDC KCMA-18-150-1A-2VA-3 Primary current: 150 A, Secondary current max.: 1 A, Load: 2 VA, Tolerance class: 3, detachable current transformer Detalles Añadir a SDC KCMA-18-200-1A-3VA-3 Primary current: 200 A, Secondary current max.: 1 A, Load: 3 VA, Tolerance class: 3, detachable current transformer Detalles Añadir a SDC KCMA-18-250-1A-1,5VA-1 Primary current: 250 A, Secondary current max.: 1 A, Load: 1.5 VA, Tolerance class: 1, detachable current transformer Detalles Añadir a SDC KCMA-18-250-1A-4VA-3 Primary current: 250 A, Secondary current max.: 1 A, Load: 4 VA, Tolerance class: 3, detachable current transformer Detalles Añadir a SDC KCMA-18-50-1A-1VA-3 Primary current: 50 A, Secondary current max.: 1 A, Load: 1 VA, Tolerance class: 3, detachable current transformer Detalles Añadir a SDC KCMA-18-50-1A-1VA-3 HUT Primary current: 50 A, Secondary current max.: 1 A, Load: 1 VA, Tolerance class: 3, detachable current transformer Detalles Añadir a SDC KCMA-18-75-1A-1VA-3 Primary current: 75 A, Secondary current max.: 1 A, Load: 1 VA, Tolerance class: 3, detachable current transformer Detalles Añadir a SDC KCMA-44-1000-5A-5VA-1 Primary current: 1000 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, detachable current transformer Detalles Añadir a SDC KCMA-44-750-5A-5VA-1 Primary current: 750 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, detachable current transformer Detalles Añadir a SDC KCMA-44-800-5A-5VA-1 Primary current: 800 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, detachable current transformer Detalles Añadir a SDC KCMA-RCM-23D Residual current transformer (RCM), Primary current: 18 A, Round conductor: 20.00 mm, detachable current transformer Detalles Añadir a SDC KCMA-RCM-58D Residual current transformer (RCM), Primary current: 18 A, Round conductor: 50.00 mm, detachable current transformer Detalles Añadir a SDC KCMA-RCM-812D Residual current transformer (RCM), Primary current: 18 A, Round conductor: 80.00 mm, detachable current transformer Detalles Añadir a SDC PNP-U-MOD-TCP Rated current: via current transformer 1 A/5 A, Applications: Power and flow measurement Detalles Añadir a SDC POWER MONITOR Supply voltage: 230 V Detalles Añadir a SDC POWER MONITOR 51A Supply voltage: 230 V Detalles Añadir a SDC POWER MONITOR BRACKET 2091060000 Detalles Añadir a SDC RCMA-B22-D125-1.5 Rogowski coil, Diameter: 125 mm, Cable length: 1.5 m « Anterior Siguiente »
Detalles Añadir a SDC CMA-101-2500-5A-10VA-0,5 Primary current: 2500 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-101-2500-5A-10VA-1 Primary current: 2500 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-100-5A-2,5VA-1 Primary current: 100 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-125-5A-2,5VA-0,5 Primary current: 125 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-150-5A-2,5VA-0,5 Primary current: 150 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-150-5A-5VA-1 Primary current: 150 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-200-5A-2,5VA-0,5 Primary current: 200 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-200-5A-5VA-1 Primary current: 200 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-250-5A-5VA-0,5 Primary current: 250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-250-5A-5VA-1 Primary current: 250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-300-5A-5VA-0,5 Primary current: 300 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-400-5A-5VA-0,5 Primary current: 400 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-400-5A-5VA-1 Primary current: 400 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-500-5A-5VA-0,5 Primary current: 500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-500-5A-5VA-1 Primary current: 500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-3151-100-AO-24DC-05 Primary current: 100 A, Output: 0(4)-20 mA, 0(2)-10 V, Load: 1 VA
Detalles Añadir a SDC CMA-3151-250-AO-24DC-05 Primary current: 250 A, Output: 0(4)-20 mA, 0(2)-10 V, Load: 1 VA
Detalles Añadir a SDC CMA-3151-500-AO-24DC-05 Primary current: 500 A, Output: 0(4)-20 mA, 0(2)-10 V, Load: 1 VA
Detalles Añadir a SDC CMA-31-600-5A-5VA-0,5 Primary current: 600 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-600-5A-5VA-1 Primary current: 600 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-60-5A-1,25VA-1 Primary current: 60 A, Secondary current max.: 5 A, Load: 1.25 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-750-5A-5VA-0,5 Primary current: 750 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-31-750-5A-5VA-1 Primary current: 750 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-31-75-5A-2,5VA-1 Primary current: 75 A, Secondary current max.: 5 A, Load: 2.5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-41-1000-5A-5VA-0,5 Primary current: 1000 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-41-1000-5A-5VA-1 Primary current: 1000 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-51-1250-5A-5VA-0,5 Primary current: 1250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-51-1250-5A-5VA-1 Primary current: 1250 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-61-1500-5A-5VA-0,5 Primary current: 1500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-61-1500-5A-5VA-1 Primary current: 1500 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-81-2000-5A-10VA-0,5 Primary current: 2000 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 0,5, closed current transformer
Detalles Añadir a SDC CMA-81-2000-5A-10VA-1 Primary current: 2000 A, Secondary current max.: 5 A, Load: 10 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-CTM-7-32-1A-02VA-1 Primary current: 32 A, Secondary current max.: 1 A, Load: 0.2 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-CTM-7-50-1A-0.4VA-1 Primary current: 50 A, Secondary current max.: 1 A, Load: 0.4 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-CTM-7-64-1A-0.5VA-1 Primary current: 64 A, Secondary current max.: 1 A, Load: 0.5 VA, Tolerance class: 1, closed current transformer
Detalles Añadir a SDC CMA-RCM-DACT-120 Residual current transformer, Primary current: 25 A, Round conductor: 120.00 mm, closed current transformer
Detalles Añadir a SDC CMA-RCM-DACT-20 Residual current transformer, Primary current: 25 A, Round conductor: 20.00 mm, closed current transformer
Detalles Añadir a SDC CMA-RCM-DACT-35 Residual current transformer, Primary current: 25 A, Round conductor: 35.00 mm, closed current transformer
Detalles Añadir a SDC CMA-RCM-DACT-60 Residual current transformer, Primary current: 25 A, Round conductor: 60.00 mm, closed current transformer
Detalles Añadir a SDC EM-CONNECTIVITY-BOX 144 Protection degree: IP42, Housing main material: Plastic
Detalles Añadir a SDC EM-CONNECTIVITY-BOX 96 Protection degree: IP54, Housing main material: Aluminium
Detalles Añadir a SDC EM-CONNECTIVITY-BOX TS Protection degree: IP65, Housing main material: Aluminium
Detalles Añadir a SDC KCMA-18-100-1A-1,25VA-3 Primary current: 100 A, Secondary current max.: 1 A, Load: 1.25 VA, Tolerance class: 3, detachable current transformer
Detalles Añadir a SDC KCMA-18-150-1A-2VA-3 Primary current: 150 A, Secondary current max.: 1 A, Load: 2 VA, Tolerance class: 3, detachable current transformer
Detalles Añadir a SDC KCMA-18-200-1A-3VA-3 Primary current: 200 A, Secondary current max.: 1 A, Load: 3 VA, Tolerance class: 3, detachable current transformer
Detalles Añadir a SDC KCMA-18-250-1A-1,5VA-1 Primary current: 250 A, Secondary current max.: 1 A, Load: 1.5 VA, Tolerance class: 1, detachable current transformer
Detalles Añadir a SDC KCMA-18-250-1A-4VA-3 Primary current: 250 A, Secondary current max.: 1 A, Load: 4 VA, Tolerance class: 3, detachable current transformer
Detalles Añadir a SDC KCMA-18-50-1A-1VA-3 Primary current: 50 A, Secondary current max.: 1 A, Load: 1 VA, Tolerance class: 3, detachable current transformer
Detalles Añadir a SDC KCMA-18-50-1A-1VA-3 HUT Primary current: 50 A, Secondary current max.: 1 A, Load: 1 VA, Tolerance class: 3, detachable current transformer
Detalles Añadir a SDC KCMA-18-75-1A-1VA-3 Primary current: 75 A, Secondary current max.: 1 A, Load: 1 VA, Tolerance class: 3, detachable current transformer
Detalles Añadir a SDC KCMA-44-1000-5A-5VA-1 Primary current: 1000 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, detachable current transformer
Detalles Añadir a SDC KCMA-44-750-5A-5VA-1 Primary current: 750 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, detachable current transformer
Detalles Añadir a SDC KCMA-44-800-5A-5VA-1 Primary current: 800 A, Secondary current max.: 5 A, Load: 5 VA, Tolerance class: 1, detachable current transformer
Detalles Añadir a SDC KCMA-RCM-23D Residual current transformer (RCM), Primary current: 18 A, Round conductor: 20.00 mm, detachable current transformer
Detalles Añadir a SDC KCMA-RCM-58D Residual current transformer (RCM), Primary current: 18 A, Round conductor: 50.00 mm, detachable current transformer
Detalles Añadir a SDC KCMA-RCM-812D Residual current transformer (RCM), Primary current: 18 A, Round conductor: 80.00 mm, detachable current transformer
Detalles Añadir a SDC PNP-U-MOD-TCP Rated current: via current transformer 1 A/5 A, Applications: Power and flow measurement
