The UL-listed Laureate Dual-Channel Pulse Totalizer provides two channels, A&B, which may be independently set up and scaled to count up from zero (or other value) to a preset limit, or count down from a preset value to zero (or other limit). Scaling allows direct readout in engineering units, such as gallons, based on counts from a turbine flow meter. Totals are stored in non-volatile memory.

The six-digit counter display is capable of displaying any value from -999,999 to 999,999 with programmable decimal point. The displayed channel (A or B) is selected via a front panel pushbutton.

The minimum recommended option for the Laureate totalizer is a dual setpoint controller output board, which is available with either 10A Form C relays or AC/DC solid state relays.

An optional Extended counter version provides capabilities beyond those of the standard counter:

* Rate and total simultaneously. Channel A can display total while Channel B displays rate. * Up/down counting. Channel A can serve as an up/down counter, where the count direction is dynamically changed by applying a signal to Channel B.
* Totalizing with external inhibit. Totalizing by Channel A can be temporarily inhibited by applying a signal to Channel B.
* Custom curve linearization. Exceptionally accurate custom curve linearization is achievable, for example to linearize the low end of turbine flow meters.
* Arithmetic functions. Channels A & B can be combined mathematically: A+B, A-B, A*B, A/B and A/B-1. For example, A+B allows two input flows to be summed for total volume, while A-B allows outflow to be subtracted from inflow for net volume. A/B allows the mixing of ingredients in a specified ratio. By monitoring and alarming the A/B volume ratio, ingredient B can be added to A until the proper ratio is achieved.

Exceptional flexibility is provided by the unit's universal dual-channel signal conditioner, which can accept magnetic signals from 12 mV to 250 Vac as well as signals from proximity switches with a PNP or NPN output, TTL or CMOS logic, or contact closures. Jumper selections provide optimum operation for different sensor types and noise conditions.

A built-in isolated 5, 10, or 24 Vdc excitation supply is standard to power proximity switches and other sensors. Options include dual relays for control or alarm, isolated 4-20 mA and 0-10V analog outputs, and an RS232 or RS485 port for data communications with a host computer or PLC. Modbus RS485 is fully supported.

The base price is $230. For more information and pricing of options, visit www.laurels.com/totalizer.htm