TOF-Watch for accurate and reliable measurement of the depth of neuromuscular blockade. What can TOF-Watch do for you? The TOF-Watch series consists of 3 monitors: TOF-Watch, TOF-Watch S and TOF-Watch SX. All 3 models accurately measure the depth of the neuromuscular blockade to help assess: Onset time of neuromuscular blocking agents The need for administration of maintenance doses When to administer a reversal agent When to safely extubate