Dwyer Instruments PBLT2-5-40 Submersible Level Transmitter 5 PSI 40 ft ETFE Cable

The Dwyer Instruments PBLT2-5-40 is a submersible hydrostatic level transmitter designed for continuous liquid level measurement in demanding industrial environments. With a 5 PSI (11.54 ft w.c. / 3.52 m w.c.) range and a 40-foot ETFE cable, this unit delivers reliable, accurate readings in applications ranging from wastewater treatment and sludge pits to chemical storage tanks and reservoirs.

At the heart of the PBLT2-5-40 is a piezoresistive sensing element enclosed in a rugged 316 stainless steel housing. The sensor measures liquid height by referencing hydrostatic pressure against atmospheric pressure through a vented cable, providing a stable 4–20 mA output signal proportional to the liquid level above the sensor.

Key Features:

• Measurement Range: 0–5 PSI (0–11.54 ft water column)
• Output Signal: 4–20 mA DC, 2-wire loop powered
• Power Requirement: 13–30 VDC
• Accuracy: ±0.25% full scale (includes linearity, hysteresis, and repeatability)
• Cable: 40 ft (12.2 m) ETFE — chemically resistant, shielded, and vented with 270 lb tensile strength
• Wetted Materials: 316 SS and 316L SS body, fluoroelastomer seals
• Temperature Limit: 0 to 200°F (-18 to 93°C)
• Compensated Temperature Range: 0 to 180°F (-18 to 82°C)
• Response Time: 50 ms
• Loop Resistance: 900 Ω
• Pressure Limit: 2× full scale
• Lightning & Surge Protection: Dual arrestor technology, grounded to case
• Maintenance-Free Vent Filter: Prevents particulates and moisture from entering the transducer
• Large Diameter 316 SS Diaphragm Seal: Non-clogging, damage-resistant to floating solids
• Compliance: CE, UKCA

Typical Applications:

• Wastewater treatment — sludge pits, clarifiers, and digesters
• Alum and chemical storage tanks
• Oil tanks and lime slurry systems
• Sumps and reservoirs

The PBLT2-5-40 mounts by suspending the probe below the measured liquid surface. An NPT connection allows rigid installation in a pipe or conduit, or the optional A-625 hanging loop can be used to attach a chain for easy retrieval. The A-297 desiccant filter is also available as an accessory for additional vent tube protection.