Count down/up to 99 hours, 59 minutes, 59 seconds. Individually numbered keys, memory recall. Stopwatch. Time-out feature. LCD digits readable at 8 feet. Flip-open easel, spring fastener, magnetic back and hole for use with lanyard. NIST traceable. With battery.
Go Direct* pH Sensor, is a general-purpose pH sensor used to monitor pH of aqueous solutions, pH range: 0-14, Type: Sealed, gel-filled, epoxy body, Ag/AgCl reference, Shaft diameter: 12 mm OD, Storage solution: pH-4/KCl solution (10 g KCl in 100 mL buffer pH-4 solution)
Digital Multimeter P3340, For universal use in measuring voltage, current, resistance, frequency, capacitance, temperature, diode and continuity tests, voltage: 9 V battery, Dimensions: 92x195x38 mm3, Weight: 200 g