COVID-19 Update: Alpha Controls & Instrumentation is here to help and support your business in anyway possible during these uncertain times. Please click here to read more.


WWDP Differential Pressure Transmitter

30 field selectable variations in just 3 models, unidirectional and bidirectional pressure ranges, with optional LCD display

Starting At
$680.00 CAD
Normally ships in 3-4 Weeks

Configure   Request Quote

Can We Help You?


Our product experts are here to help you find the right solution for your application!

The Series WWDP Wet-to-Wet Differential Pressure Transmitter offers everything in one package by having 30 field selectable variations in just 3 models. The WWDP provides field selectable unidirectional and bidirectional pressure ranges, configurable 0 - 5 VDC, 1 - 5 VDC, 0 - 10 VDC, and 4 - 20 mA output. It also provides an auto-zero capability. The field selectable port swap feature eliminates costly replumbing if the unit is improperly installed or if the transmitter is simply replaced. An optional LCD display is available for on-sight indication of line and differential pressure. The all cast aluminum housing is rated NEMA 4 (IP66). These features make the WWDP transmitter an ideal instrument for measuring the flow of various liquids and gases, pressure drop across filters, measurement of liquid level or pressurized vessels, and for use in energy management and process control systems.

• Versatile device for liquid or gas supports designs requiring more precise measurements in support of application
• Field selectable port swap eliminates costly re-plumbing if unit is re-installed or replaced
• Uni-directional and bi-directional pressure selection with configurable output provides a single device that can meet broad application needs without having to specify multiple devices
• Optional LCD display provides local status to identify operational conditions
• NEMA 4 rated enclosure provides protection in harsh environments permitting outdoor monitoring or in areas where dust and particulate matter exists

Service Gases or liquids compatible with 17-4 PH stainless steel
Accuracy All pressure ranges have 1% full scale accuracy except the lowest selectable range of each unit is 2% full scale
Stability 0.5% per year
Temperature Limits Compensated temperature range: 32F - 130F (0C - 54C);
Operating temperature range: -4F - 185F (-20C - 85C)
Pressure Limits Max working pressure:
WWDP-1: 50 PSI;
WWDP-2: 100 PSI;
WWDP-3: 250 PSI;
Proof pressure: 2.2 x FS;
Burst pressure: 40 x FS
Thermal Effect 2% FS/100F (50C) includes zero and span
Power Requirements 12 - 30 VDC / 18 - 28 VAC (Reverse Excitation Protected).
Note: 4 - 20 mA output cannot be powered with AC voltage
Output Signal Selectable 0 - 5 VDC, 0 - 10 VDC, and 1 - 5 VDC; 4 - 20 mA
Zero & Span Digital "re" zero button (should be used when changing ranges). Span can be adjusted by changing between field selectable ranges
Response Time 1 s - 5 s (selectable)
Loop Resistance 1000 Ω
Current Consumption VDC power: 0 - 5 VDC, 1 - 5 VDC output 4 mA (typ); 0 - 10 VDC output 5 mA (typ); 4 - 20 mA output 20 mA max. Current consumption will equal the transmitter output in current mode. VAC power: 0 - 5 VAC, 1 - 5 VAC, 0 - 10 VDC output 40 mA (typ)
Electrical Connections 1/2 in conduit
Process Connections 1/8 in female NPT internal
Enclosure Rating Designed to meet NEMA 4 (IP66)
Mounting Orientation Vertical; mount the pressure ports down (keeps debris from building up inside the pressure port)
Weight 1.5 lb (680.4 g)
Agency Approvals CE

• Monitor differential pressure of a chiller
• Filter monitoring
• Liquid level
• Pressure vessels
• Process control
• Energy management