Data Logger, Pulse Quantity in Basket:noneCode: APDL100.006 Price:$210.00Shipping Weight: 1.00 pounds NIST Traceable Certificate of Calibration: $75 Windows Software w/ PC Interface Cable: $105 Quantity: APT DL100 Data Logger Low-cost Re-usable Realtime Operation Compact: 56 x 35 x 15mm Download DL100 Product Sheet (.pdf; 124KB) Parameter Range Accuracy Resolution Memory Features Pulse/Event 1 to 1,000,000 (TTL, Internal Pullup or Contact Closure)* ±10mSec 1 21,845 10k ohm impedance. Green LED sampling indicator. Progr Eng unit. (+30Vdc max Pulse) *External sensor required. Not included with package.