The 751-pH package comprises Windmill Software for Windows, a USB unit to measure 12 pH channels and signal conditioning. Connect 8 units to 1 PC to monitor up to 96 pH probes.

Note, this package is not suitable for interfacing pH meters. For pH meters choose our Windmill + COMIML serial driver package, for just 50 pounds.

Features

• Monitor 12 pH electrodes or probes.
• Includes the powerful yet easy-to-use Windmill Software for Windows: no programming required
• Connect up to 8 units to one PC
• Connects over USB
• Choice of four analogue input ranges
• Integrating analogue-to-digital converter reduces electrical noise
• Use software to select the resolution of the A-D converter from 12- to 18-bits: choose high throughput or high resolution
• Set two alarms on each pH probe
• Can also measure temperature, strain, pressure etc (with extra hardware)
• Automatic recalibration
• Comprehensive User Manual
• Free technical support for life and money-back guarantee if not satisfied

pH Measurement

The 751-pH package includes a pH connection box. Just connect your electrodes to this box's input protected sockets, plug the box into the 751 measuring unit and away you go. This method of connection means you can use the same 751 measuring unit to monitor, for example, temperatures.

Software

Windmill Software is included in the price. This modular suite offers data logging, charting, alarm indication, output control, process mimic generators, sequence control, programming tools and other applications.

Free Technical Support and Money-Back Guarantee

All our systems come with free technical support for life and a guarantee that if you aren't satisfied we'll give you your money back.

Hardware Specifications

 Dimensions (mm)          180 x 120 x 40
 Maximum length of cable  5 m
 Maximum distance from PC can be increased by 
    use of USB hubs
 No pH probe inputs       12, expandable to 16 on request 
ANALOGUE INPUTS
 Maximum # inputs        16 differential
Maximum safe input voltage:
 Power supply on         ±48 V
 Power supply off        ±33 V
 Transient               ±300 V
Amplifier:
 Ranges (V)              ±0.01, ±0.1, ±1, ±10
 Common mode range       ±13 V
 Relative accuracy of ranges:
 gain = 1000            ±0.1%
 gain = 1, 10, 100      ±0.05%
Analogue to Digital Converter:
 Maximum linearity error ±0.02%
 Resolution    Integration Time    Samples/Second
 12 bits         2.5 msec          80
 13 bits         5 msec            64
 14 bits        10 msec            48
 15 bits        20 msec            32
 16 bits        40 msec            16
 18 bits       160 msec             6
DIGITAL INPUTS/OUTPUTS
 Maximum # inputs        32
 Maximum # outputs       32
 (selected through Windmill in ports of 8 lines)
 Power-up state          all inputs
 Compatibility           TTL and 5 V CMOS, can be made 
 contact closure compatible
 Range                   0 to 5 V
 Output capability       15 LSTLL loads
 Maximum I/O speed       160 channels per second
COUNTERS
 Resolution              16 bits
 Compatibility           TTL, 5 V CMOS, can be made
 contact closure compatible
 Input voltage range     0 to 5 V
 Maximum count speed     160 counts per second