The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes. Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2014 Dwyer Instruments, Inc.

1. Pressure Transmitters
The materials included in this compilation are for the use of Dwyer Instruments, Inc. potential customers and current employees
as a resource only. They may not be reproduced, published, or transmitted electronically for commercial purposes.
Furthermore, the Company’s name, likeness, product names, and logos, included within these compilations may not be used
without specific, written prior permission from Dwyer Instruments, Inc. ©Copyright 2014 Dwyer Instruments, Inc.

2. Overview
626/628 628CR TPT

3. 626/628 - Introduction
Oil filled piezoresistive sensor
Designed for OEM and industrial applications
All 316L SS wetted material, no gaskets
Pressure ranges from 0.5Bar to 550Bar

4. 626/628 - Key Specifications
Accuracy: ±0.25% FS (626); ±1% FS (628)
Enclosure: General Purpose or Conduit
Temperature Limits: -18 to 85ºC
Output Signal: 4 to 20 mA, 0-5, 1-5, 1-6, 0-10, 0.5-4.5 VDC
Process Connections: NPT, BSPT, SAE
Electrical Connections: DIN, Conduit, M12, Packard
Agency Approvals: CE and FM (for Fire Pump applications)

5. 626/628 – Features
Rugged IP66, 316L stainless steel construction.
Highly reliable piezoresistive technology.
Multiple configurations to fit individual
customer’s requirements
General purpose or conduit enclosure available.
LED pressure display available with conduit
enclosure.

6. 628CR - Introduction
Thick film ceramic sensing element
Stainless Steel IP66 enclosure
4-20mA signal output
Ranges from 2.5Bar to 40Bar

7. 628CR - Key Specifications
Accuracy: ±1% FS
Temperature Limits: -18 to 85ºC
Process Connections: ¼” male NPT or BSPT
Electrical Connection: Cable or DIN
Wetted Materials: Ceramic, fluoroelastomer,
316L SS
Agency Approvals: CE

8. 628CR - Features
Economic ceramic sensor
Durable IP66 enclosure
Designed to meet or exceed OEM specifications
Optional NIST traceable certificate
Can be mounted in any orientation

9. TPT - Introduction
Silicon piezoresistive sensor technology
Ranges from 6.8 to 344 Bar
4 to 20 mA or Ratiometric output
Stainless Steel IP66 enclosure

10. TPT - Key Specifications
Accuracy: ±1% FS (RMS)
Temperature Limits: -20 to 85ºC
Output Signal: 4 to 20 mA or 0.5 to 4.5 VDC
Process Connections: ¼” male NPT
Electrical Connection: Packard
Wetted Materials: 17-4PH SS

11. TPT - Features
Pressure connection is machined from a solid
piece of 17-4PH Stainless Steel. No welds or
O-rings.
Designed for applications with high shock and
vibration
Can withstand 2x span proof pressure and 3x
span bust pressure.

12. Applications
Irrigation System Manufacturers
Used to modulate Variable Frequency Drives (VFD)
for constant water pressure

13. Applications
Compressed Air Systems
Monitors downstream pressure, provides input to
VFD and maintain set point

14. Applications
Automotive test systems
Monitors exhaust and air intake pressures for data
collection

15. Applications
Injection Molding
Nozzle and mold pressure monitoring

16. Application
Reverse Osmosis
Pressure Transmitters used for VFD control
Also used for diagnostics of filter membrane &
initial backwash

17. Application
Ready Mix/Construction Vehicles
Remote indication of drum hydraulic pressure