P421 Submersible Pressure Transmitter

Brand: Tel-Tru Manufacturing Co.

Tel-Tru's P421 submersible pressure transmitter is designed for the OEM and end-users where continuous submersion in sludge/slurry applications is required.

The P421's key feature is its clog free design of the sensing diaphragm, which improves reliability and lowers maintenance. The P421 is manufactured to perform over time in harsh well environments.

An internal network of MOV’s and dual gas discharge tubes protect against lightning, while dual sealing techniques ensure the integrity of the waterproof seal.

The P421 all welded sensing diaphragm is “backed-up” with a solid piece of stainless steel and can withstand the most abrasive / cyclical applications.

Specifications

Accuracy

  • Static Accuracy: ± 0.25 % of Full Scale Output
  • Static Accuracy: ± 0.5 % of Full Scale Output (BFSL, RSS) Combined Effects of Non-Linearity, Hysteresis & Repeatability,

Applications

  • Heavy Slurries
  • Hydro Electric
  • Level & Depth Measurement
  • Wastewater Treatment

Approvals & Certifications

  • CE EN 50081-2, EN 50082-2

Burst Pressure

  • 5 times Full Scale

Cable Material

  • Polyurethane
  • Tefzel

Communication

  • HART

Compensated Temperature

  • -17.8° to 76.7° C (0° to 170° F)

Electrical Connectors

  • Submersible 1/2” NPT Male Conduit Connection with 10 to 50 feet Vented Polyurethane & Tefzel Cable

Electrical Protection

  • Lightning Protection: MOV & Dual Gas Discharge Tube
  • Short Circuit Protected: up to 40 Vdc

Enclosure, Body Material

  • 316L Stainless Steel

Excitation Voltage

  • 8-38 Vdc

Insulation Resistance

  • 1,000 megaohms at 50 Vdc

Mounting

  • Pressure Port: Flush Mounted

NACE & NIST

  • NIST Traceable Calibration Certificate

Operating Temperature

  • -40° to 93° C (-40° to 200° F)

Output

  • 0.5 - 4.5 Vdc - P421J
  • 0-5 Vdc, 3-Wire - P421B
  • 4-20 mA, 2-Wire - P421A

Power Supply Effect

  • ± 0.002 % of Full Scale Output Per V Input

Pressure Range

  • bar: 0 to 51.7
  • Feet WC: 0 to 500
  • kPa: 0 to 5,171
  • psi: 0 to 750

Pressure Type

  • Gauge

Proof Pressure

  • 2 x Full Scale

Repeatability

  • ± 0.1 % of Full Scale Output

Resolution

  • Infinite (± 0.001 % of Full Scale Output Usable)

Response Time

  • < 5 milliseconds

Reverse Polarity Protection

  • Yes

RFI/EMI Protection

  • Internal Filtering

Stability

  • Long Term Stability: ± 0.25 % of Full Scale Output Per Year

Storage Temperature

  • -40° to 121° C (-40° to 250° F)

Temperature Effect

  • ± 1.5 % of Full Scale Output over Compensated Range [Combined Effects of Zero & Full Scale Output with Reference at 21° C (70° F)]

Update Time

  • Warm-Up: < 10 milliseconds

Zero Balance

  • ± 1 % of Full Scale Output

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