Tel-Tru P421 Specifications

P421

Submersible Pressure Transmitter

Precision Grade--

Clog Free in Waste Water/ Sludge/ Slurry Applications

Designed for clog free operation in slurry
applications

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.

Manufactured for reliability in harsh well
environments

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. 100% of P421 transmitters are
submerged at our factory for at least 24 hours.

“Backed-up” sensing diaphragm
The P421 all welded sensing diaphragm is “backed-up” with

a solid piece of stainless steel and can withstand the most
abrasive / cyclical applications.

Certification

Every P421 is shipped with a NIST traceable calibration
certificate.

MOV & Dual Gas Discharge Tube

Lightning Protection Network

Internal EMI/RFI

Filtering

CE

Conforms to EN50081-2 and EN50082-2

Standard Features

Flush-clog free sensor
Internal protection from lightning and EMI/RFI
=±0.5% FSO Static Accuracy

Available Options

=±0.25% FSO Static Accuracy

®

Cable

Tefzel
Low Power Consumption

Note: specifications are subject to change.

Tel-Tru Manufacturing Co.
408 St. Paul Street
Rochester, New York 14605 USA

Phone: [phone] • 800-232-5335 • Fax: [phone] • E-mail: [e-mail] • Web: www.teltru.com

P421 Pressure Transmitter

Submersible Level for Sludge/Slurry Applications
0-10 ft H

O through 0-500 ft H2O

2

Product Specifications

Electrical

Excitation 8-38 Vdc*
Output
P421A 4-20 mA
P421B 0-5 Vdc*
Zero Balance =±1% FSO
FSO Setting =±1% FSO
Resolution Infinite (±.001% FSO usable)
Response Time < 5 mS
Insulation Resistance 1000 MO @ 50 Vdc
Reverse Polarity Protected
Warm-up < 10 mS
Power Supply Effect =±.002% FSO per V input
EMI/RFI Internal Filtering
Lightning Protected MOV & dual gas discharge tube
Short Circuit Protected Up to 40 Vdc

Performance

Mechanical

Pressure Ranges 0-5 through 0-300 psi
(Customer may specify any range/eng. unit FOC)

Proof Pressure 2X Full Scale*
Burst Pre ssure 5X Full Scale*
Materials 316L SST plus cable*
Pressure Port Flush mount per outline below*
Electrical Connector ½”-NPT Male submersible conduit fitting
with 10ft of polyurethane cable*
Dimensions per outline below
Weight nominal 20 oz

Environmental

Compensated Temp Range 0 to 170 oF
Operating Temp Range -40 to 200 oF
Storage Temp Range -40 to 250 oF

Static Accuracy =±0.5% FSO* (BFSL, RSS)*

(combined effects of non-linearity, hysteresis & repeatability)

Repeatability =±0.1% FSO
Temperature Effects =±1.5% FSO over comp range*

(combined effects of Zero & FSO with reference at 70 oF)

Long Term Stability =±0.25% FSO per year

Note: specifications are subject to change.

Tel-Tru Manufacturing Co.
408 St. Paul Street
Rochester, New York 14605 USA

Phone: [phone] • 800-232-5335 • Fax: [phone] • E-mail: [e-mail] • Web: www.teltru.com

*Options Available

Outline