Key Product Highlights — Truflo TK3W (316 SS) Blind Sensor with Pulse / Analog Outputs
1) 316 Stainless Steel Wetted Construction for Rugged Industrial Duty
- 316 SS sensor body supports demanding environments and robust mechanical durability
- Suitable for harsh process areas when paired with appropriate seal selection (FKM standard; EPDM/FFKM optional)
2) “Blind” Design with LED Indication (No Numeric Display)
- Blind sensor format eliminates the local numeric readout where it’s not needed
- Bright LED indicator provides quick visual confirmation/status
- Pre-programmed design supports quick installation with no programming required
3) Wide Operating Range with High Repeatability
- Operating velocity range: 1–33 ft/s (0.3–10 m/s)
- ±0.5% F.S. linearity and ±0.5% F.S. repeatability @ 25°C (77°F)
- Intended for full-pipe liquid flow measurement
4) Output Flexibility for PLC/DCS and Monitoring Systems
- Supports NPN pulse output
- Supports 4–20 mA output and voltage output options (model dependent)
- Available configurations include 4–20 mA + pulse (where specified with M12 wiring)
5) ShearPro® Paddle Wheel + Wear-Resistant Internals for Long Service Life
- ShearPro® contoured profile reduces turbulence and increases longevity
- ETFE (Tefzel®) paddle wheel for chemical and wear resistance
- Zirconium ceramic rotor pin/bushings for high wear resistance and reduced fatigue stress
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Blind in-line paddle wheel flow meter sensor (316 SS body) |
| Operating Range | 1–33 ft/s (0.3–10 m/s) |
| Pipe Size Range | ¼”–4″ (note: ¼”–¾” SS only per datasheet note) |
| Linearity | ±0.5% of full scale @ 25°C (77°F) |
| Repeatability | ±0.5% of full scale @ 25°C (77°F) |
| Local Indication | Blind with LED indicator (no numeric display) |
| Outputs | NPN pulse, 4–20 mA, voltage (model dependent) |
| Frequency (nominal) | 49 Hz per m/s; 15 Hz per ft/s |
| Supply Voltage | 9–30 VDC ±10% regulated |
| Wetted Body Material | 316 stainless steel |
| O-Rings | FKM (standard); EPDM (optional); FFKM (optional) |
| Rotor Pin / Bushings | Zirconium ceramic (ZrO2) |
| Paddle / Rotor | ETFE (Tefzel®), ShearPro® design |
| Enclosure Rating | NEMA 4X / IP66 |
| 316 SS Pressure/Temperature (Non-Shock) | 200 psi @ 180°F; 40 psi @ 300°F (14 bar @ 82°C; 2.7 bar @ 148°C) |
| 316 SS Operating Temperature | -40°F to 300°F (-40°C to 148°C) |
| Standards & Approvals | UL, NSF, CE, RoHS compliant |
| Notes | K-factor is pre-programmed; lifetime warranty applies to paddle wheel assembly (per datasheet statement) |
Suitable Applications — Truflo TK3W (316 SS) Blind Sensor
The TK3W is ideal when you want the durability of 316 stainless steel and dependable paddle wheel sensing, but you don’t need a local numeric display because readings are handled by a PLC, transmitter, or panel meter. Its output flexibility also makes it well suited to OEM skid integration and industrial automation systems.
- PLC/DCS flow monitoring using 4–20 mA or voltage output
- Flow/no-flow permissive logic or interlocks using pulse output
- Chemical transfer/distribution systems requiring 316 SS wetted construction
- OEM skid systems where panel/HMI provides the primary display
- Washdown or outdoor installations requiring NEMA 4X / IP66 protection
- Utility and process water monitoring in industrial facilities
- Applications needing long-life rotor design and low maintenance operation