11 Solenoid driven dosing pumps Digital dosing pump with constant flow rate with manual adjustment; proportional flow rate uses an external analog (4 - 20 mA) or digital pulse signal (e.g. from water meter). < Timer function, ppm dosing, statistics, password and On/Off input (remote switch). Tekna TPG Digital dosing pump with proportional dosage Digital dosing pump with pH/Redox control meter built in. < Digital interface for constant or proportional dosing, depending on the measured pH or Rx value < PT100 probe input for thermal compensation < Repetition alarm relay < Input On-Off for remote control < 4 - 20 mA output for measure transmission Tekna TPR Digital dosing pump with proportional dosage Digital dosing pump with constant flow rate with manual adjustment, or timer control. < Programmable timed relay Tekna TCK Digital dosing pump with timed dosage