NSF Certified Submersible Level Transmitter
NSF Certified Submersible Level Transmitter - Image 2
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NSF Certified Submersible Level Transmitter

PT-500E

Reliable Level Measurement for Potable Water

The PT-500E Submersible Level Transmitter is NSF/ANSI/CAN 61 and 372-certified for safe, compliant use in potable water applications. Designed for durability, this sensor delivers precise liquid level measurement in tanks, wells, and water and wastewater systems. Whether you’re monitoring well depth or managing municipal water supplies, the PT-500E ensures accurate, long-lasting performance in clean water environments.

  • Certified for Safe Use: Meets NSF/ANSI/CAN 61 and 372 standards for reliable performance in potable water applications
  • Versatile Applications: Ideal for tanks, wells, and wastewater systems
  • Quick & Easy Installation: Designed for simple setup, saving you time and effort
  • Built-In Lightning Transient Protection: Featured on every model
  • Multiple Output Options: Supports 4-20 mA, 0-5 VDC, and Modbus RTU for seamless system integration

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PT-500E Datasheet

PT-500E User Manual

PT-500E Installation Guide

Modbus Setup Software
  • Accuracy (linearity, hysteresis, & repeatability): ± 0.25% of span (BFSL) (1% for ≤ 1 psi)
  • 1 Year Stability: 0.75% FSO
  • Temp Effects on Zero & Span: ≤ 0.025% FS/ºF @ 70º
  • Maximum Depth: Submersible up to 575 ft.
  • Standard Compensated Temp.:
    • ≤ 10 psi: 0º to 60ºC / 32º to 140ºF
    • > 10 psi: -10º to 70ºC / 14º to 158ºF
  • Storage Temp: -40º to 82ºC / -40º to 180ºF
  • Operating Temp: -40º to 85ºC / -40º to 185ºF
  • Supply Voltage:
    • 4-20 mA, 0-5 VDC, 1-5 VDC: 9-28 VDC
    • 1-10 VDC: 14–20 VDC
    • mV/V: 10 VDC
    • Modbus RTU: 9–20 VDC
  • Current Draw:
    • 4-20 mA: 3–30 mA
    • 0-5 VDC, 1-5 VDC, 1-10 VDC: 3 mA
    • Modbus RTU: 2 mA
  • Electrical Connection:
    • Vented watertight cable w/free ends
    • Up to 200 lbs tensile strength
  • Electrical Protection:
    • Built in Lightning Transient and Surge protection
    • Protected against reverse polarity, surge per IEC 61000-4-5
  • Output:
    • 4-20 mA
    • 0-5, 1-5, 1-10 VDC
    • mV/V
    • Modbus RTU
  • Sensor Housing: 316L SS
  • Enclosure: 316L SS
  • Seal Housing: 316L SS
  • Seal: Viton ETP-s
  • Protective Nose Cone: 316L SS
  • Cables: Polyurethane
  • NSF 61 and 372 Certification
What does NSF 61 & 372 mean?
  • NSF/ANSI/CAN 61: Indicates that the materials used in a product are safe for contact with drinking water. The standard evaluates the potential for products to leach harmful chemicals or contaminants into the water. A product that meets NSF 61 ensures it won’t negatively affect water quality or public health when used in drinking water systems.
  • NSF 372: Indicates that the product contains less than 0.25% lead by weight, in compliance with the U.S. Safe Drinking Water Act. This is crucial for products to ensure they are safe for drinking water applications and align with regulations limiting lead exposure.

The PT-500E can be submerged in a tank with a minimum capacity of 10 gallons.

The operating temperature for the PT-500E is -40º to 185ºF. It is not recommended to use the PT-500E in water that is heated outside the operating temp.

OUTPUT

4-20 mA, Modbus, mV/V, Voltage
LIGHTNING PROTECTION

Yes
INDUSTRY

Water & Wastewater
CERTIFICATION

NSF 372, NSF 61
PRESSURE

0-250 psi
DISTANCE

Up to 575'

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WARRANTY

APG warrants its products to be free from defects in material and workmanship under normal use and service of the product for 24 months from the date of shipment from APG, unless otherwise specified by APG in writing. Read our full warranty policy HERE.

RETURNS

Returns and allowances must be authorized by APG in advance, which authorization may be granted or withheld by APG in APG’s sole and absolute discretion. Read our full return policy HERE.

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