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FLOWLINE Pressure Level Sensors
A pressure level sensor determines liquid levels by measuring the hydrostatic pressure exerted by the water column on its piezoelectric sensing element. Since this pressure is directly related to the height of the liquid, the sensor can translate it into a corresponding analog signal. There are two primary types of pressure level sensors: submersible and external-mount. Submersible sensors are lowered directly into the liquid and suspended by their cable, while external-mount sensors are installed outside the tank, usually threaded into a tap or tee fitting.
Features
- Rugged 316 SS transducer body and threaded fitting mount
- Offered in cable or connector termination for flexible installation
- Integral surge protection for lightning strikes or power surges
- Automatic temperature compensation for reliable measurement
Applications
- Process water
- Diluted chemicals
How the DeltaSpan™ LD30 Works
The LD30 general-purpose external mount pressure level transmitter offers continuous liquid level measurement up to 34.65 ft (10.5 m) of water column with a 4–20 mA output. Available in two measurement ranges and termination styles, choose the -S_01 model for cable termination or the -S_11 model for an M12 connector. Designed for use with clean, 316 SS-compatible liquids, the LD30 is ideal for applications involving process water and diluted chemicals.
Features
- Rugged sensor designed for complete submergibility
- 316 stainless steel sensor body with polyurethane cable
- Maintenance-free vent tube with filter ensures accuracy
- Mounting kit for easy tank install and conduit termination
- Integral surge protection for lightning strikes or power surges
- Automatic temperature compensation for reliable measurement
- Clean liquids compatible with 316 SS and polyurethane
- Well water
- Diluted chemicals
Applications
How the DeltaSpan™ LD31 Works
The LD31 general-purpose submersible pressure level transmitter provides continuous liquid level measurement up to 34.65 ft (10.5 m) of water column with a 4–20 mA output. Available in three measurement ranges, choose the model that matches your tank height or well depth. For easy installation with junction box termination, pair the sensor with the optional mounting kit, which includes a junction box with terminal strip, mounting plug, and liquid-tight cable connector. The LD31 is ideal for clean liquids compatible with 316 stainless steel and polyurethane, such as well water and diluted chemicals.
Features
- Clog resistant diaphragm with heavy duty shield
- Robust 316 stainless sensor with polyurethane cable
- Maintenance-free vent tube and filter ensure accuracy
- Mounting kit for easy sensor suspension within the sump
- Integral surge protection for lightning strikes or power surges
- Automatic temperature compensation for reliable measurement
Applications
- Sewer
- Storm water
- Wastewater
How the DeltaSpan™ LD32 Works
The LD32 general-purpose submersible pressure level transmitter is designed for lift station applications, providing continuous liquid level measurement up to 34.65 ft (10.5 m) of water column with a 4–20 mA output. Offered in three measurement ranges, select the model that suits your sump depth. For easy installation, the optional cable hanger mounts at the top of the sump, allowing you to suspend, adjust, lock, or remove the sensor using its cable. The LD32 is ideal for dirty liquids compatible with 316 stainless steel and polyurethane, such as sewage, stormwater, and wastewater.
Features
- Corrosion-resistant PTFE sensor body and FEP cable
- Rugged sensor designed for complete submergibility
- Maintenance-free vent tube with filter ensures accuracy
- Mounting kit for easy tank install and conduit termination
- Integral surge protection for lightning strikes or power surges
- Automatic temperature compensation for reliable measurement
Applications
- Acidic Chemicals
- Caustic Chemicals
How the DeltaSpan™ LD33 Works
The LD33 general-purpose anti-corrosion submersible pressure level transmitter provides continuous liquid level measurement up to 34.65 ft (10.5 m) of water column with a 4–20 mA output. Built with corrosion-resistant PTFE, it is available in three measurement ranges—choose the model that matches your tank height. For easy installation with junction box termination, pair the sensor with the PVDF mounting kit, which includes a junction box with terminal strip, mounting plug, and liquid-tight cable connector. The LD33 is ideal for clean, corrosive liquids compatible with PTFE and FEP, such as acidic and caustic chemicals.
Features
- Level and temperature measurement in one sensor
- Rugged sensor designed for complete submergibility
- 316 stainless steel sensor body with polyurethane cable
- Maintenance-free vent tube with filter ensures accuracy
- Mounting kit for easy tank install and conduit termination
- Integral surge protection for lightning strikes or power surges
- Automatic temperature compensation for reliable measurement
Applications
- Well water
- Diluted chemicals
How the DeltaSpan™ LD36 Works
The LD36 dual-purpose submersible level and temperature pressure transmitter provides continuous liquid level measurement up to 34.65 ft (10.5 m) of water column and temperature monitoring from -40° to 257°F (-40° to 125°C) with dual 4–20 mA outputs. For easy installation with junction box termination, pair the sensor with the mounting kit, which includes a junction box with terminal strip, mounting plug, and liquid-tight cable connector. The LD36 is ideal for clean liquids compatible with 316 stainless steel and polyurethane, such as well water and diluted chemicals.
Features
- Rugged PTFE transducer and threaded fitting mount with 316 SS body
- Offered in cable or connector termination for flexible installation
- Integral surge protection for lightning strikes or power surges
- Automatic temperature compensation for reliable measurement
Applications
- Acidic Chemicals
- Caustic Chemicals
How the DeltaSpan™ LD37 Works
The LD37 general-purpose anti-corrosion external mount pressure level transmitter provides continuous liquid level measurement up to 11.55 ft (3.4 m) of water column with a 4–20 mA output. Available with either cable (-S_01) or M12 connector (-S_11) termination, choose the model that best fits your installation needs. Constructed from corrosion-resistant PTFE, the LD37 is ideal for clean, aggressive liquids such as acidic and caustic chemicals.
