Specifications include, but are not limited to: Capital Controls Model Number 17T2012ACX Amperometric Titrator (No Substitutes) SPECS: 1.DeNora Model number 17T2012ACX 2.The amperometric titrator shall be a completely portable device operating from a self-contained, completely sealed, lead-acid battery and be capable of determining the end point in titrations for chlorine residual with a sensitivity of 0.005 mg/l. Within the molded ABS housing and FRP base are the built in battery charger and a 3 prong line cord. Power required for the battery charger or lab operation 120 Vac, 50 or 60 Hz. The front panel shall contain an LED, which functions as both a pilot light and, when flashing, as a reminder that the battery needs recharging. 3.The electrode cell shall consist of 2 metal electrodes in a single plug in holder, a dc potential shall be impressed. The unit shall be equipped with a switch to select the proper impressed electrode potential for either free or total residual so there will be no potentiometers to balance or salt bridges to maintain. 4.The unit shall come complete with 1 mL and 5-mL pipette with the unused on being stored within the unit to prevent loss or breakage. An internal witch shall be used to select high or normal sensitivity depending on residual range to be titrated. Solid state circuitry shall be utilized to provide a characterized log/linear signal to the vertical display meter giving maximum meter deflection as the end point is approached. The unit shall provide maximum one hand operational convenience that does not require re-ranging as the titration process progresses. A built in multi-turn needle valve shall be mounted on the titrator for the accurate addition of titrant. The titrant shall be dispensed from an internal, collapsible plastic bag with a 500-mL capacity.