OEM Pumps help Meet Rising Demand for Chlorine Monitors

A specialist manufacturer of water quality measurement and monitoring systems is using peristaltic pump technology from Watson-Marlow Pumps Group for use in chlorine monitoring equipment after similar pumps were found less reliable.

With customers that include water, industrial and pharmaceutical companies, Analytical Technology Inc (ATI) designs and manufactures its products in the USA. The company switched to Watson-Marlow OEM pump technology some 15 years ago for chemistry modules used in equipment types that include its A15/66 residual sulphite monitor and A15/82 fluoride monitor. Each of these units houses a Watson-Marlow 313FAC/D2 OEM pump and this is now also the case for ATI’s more recently developed Q45H/79 chlorine monitors.

Typically, ATI’s UK subsidiary imports monitors directly from its US manufacturing headquarters. However, for one recent high profile application, the company was faced with a dilemma.

“Around two and half years ago, the demand for our chlorine monitors grew as Yorkshire Water instigated a drive away from the 24V DC pumps it used conventionally, opting in favour of fixed speed 110V AC models on the basis of cost and reliability,” said ATI’s Technical Manager, Chris McTear. “Our Q45H/79 Total Chlorine Monitor was the perfect fit in all ways except one – the physical footprint was too large. For this particular Q45H/79 application we had to redesign the enclosure and select a smaller pump – the 313FAC/D2, to ensure it could physically fit inside the available space envelope. As a result we now buy pumps for this monitor directly from Watson-Marlow in the UK.”

Purposely designed as a high precision OEM peristaltic pump, the Watson-Marlow 313FAC/D2 is made up of a 313D pumphead, induction motor, purpose-designed gearbox and faceplate. It is available in three standard voltages with a choice of four speeds providing flow rates up to 1620ml/min from 8.0mm bore tubing (1350ml/min if used on 50 Hz supplies). The 313D pumpheads mount to either Watson-Marlow 300 series OEM drives or the user's own drives having the same shaft arrangement.