Greyline TTFM 6.1 Transit Time Flow Meter
Accurate Flow Measurement of Clean Liquids with Non-Contacting Transducers
Accurately measure the flow rate of relatively clean, non-aerated liquids like potable water, raw water, cooling water, de-ionized or reverse-osmosis water, oils and chemicals in full pipes. Ultrasonic transducers mount on the outside of a pipe without shutting down flow. Flow rate is displayed on the large, backlit display, along with total volume, signal strength, relay status, and other diagnostic values. Use the built-in control relays as flow alarms or volume totalization. Connect the isolated 4-20mA output to PLC's or controllers. A 128MB data logger is standard, capable of capturing up to 26 million data points. Optional MODBUS RTU via RS-485 available for connection to automation systems.
The TTFM 6.1 works on a wide range of pipe sizes and materials including carbon steel, stainless steel, ductile iron, concrete lined ductile iron, cast iron, PVC, PVDF, fiberglass, copper, brass, aluminum and pipes with bonded liners including epoxy, rubber and Teflon.
The TTFM 6.1 Transit Time Flow Meter operates by measuring the “transit time” or “time of flight” for ultrasonic sound pulses transmitted from one transducer to another. Depending on the mounting configuration, the signal may cross the pipe once, twice or four times. To measure flow the transit time is compared between ultrasonic signals travelling upstream and downstream.
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TECHNICAL SPECIFICATIONS:
| General Specifications | |
|---|---|
| Spec name: | Description: |
| Operating Parameters | For clean liquids in full pipes with less than 2% solids or gas bubbles |
| Programming | Built-in, 5-button keypad with English, French, and Spanish menu language selection |
| Electronics Enclosure | NEMA4X (IP 66) polycarbonate with clear, shatterproof cover |
| Accuracy | ±1% of reading from 0.5 m/s to 12.0 m/s (1.5 ft/s to 40 ft/s) and ±0.0046 m/s (±0.015 ft/s) for velocity below 0.46 m/s (1.5 ft/s). Repeatability & Linearity: ±0.25% |
| Display | White, backlit matrix - displays 5-digit flow rate with floating decimal, 14-digit totalizer, relay status, operating mode, and calibration menu |
| Power Input |
100-240 V AC 50/60 Hz, 10 VA maximum Optional: 9-32 V DC, 10 W maximum |
| Analog Output | Isolated 4-20mA / 0-5 V, 1000 ohms load maximum, programmable offset |
| Control Relays |
2 Relays, form 'C' dry contacts rated 5 A SPDT; programmable flow alarm and/or flow proportional pulse Optional: 4 additional (6 total), rated 5 A SPDT |
| Data Logger | Built-in 128 MB data logger with a USB output and Windows software. Capacity for approximately 26 million data points |
| Operating Temperature (Electronics) | -20 °C to 60 °C (-5 °F to 140 °F) |
| Approximate Shipping Weight | 5.5 kg (12 lbs) |
| Sensor Specifications | |
|---|---|
| Spec name: | Description: |
|
Pipe Diameter (suggested) |
SE16A - 15 mm to 100 mm (0.5 in to 4 in) SE16B - 50 mm to 250 mm (2 in to 10 in) SE16C - 200 mm to 1200 mm (8 in to 48 in) |
| Flow Velocity Range | ±0.02 m/s to 12 m/s (±0.07 ft/s to 40 ft/s) |
| Pipe Materials | Any metal or plastic sonic conducting material including carbon steel, stainless steel, ductile iron, concrete-lined ductile iron, cast iron, PVC, HDPE, PVDF, fiberglass, copper, brass, aluminum, and pipes with bonded liners including epoxy, rubber, and Teflon |
| Operating Frequency |
SE16A - 2.56 MHz SE16B - 1.28 MHz SE16C - 640 kHz |
| Operating Temperature | -40 °C to 150 °C (-40 °F to 300 °F) |
| Transducer Mounting Kit |
SE16A - Includes stainless steel track with pipe clamps and built-in ruler and coupling compound. SE16B - Includes a set of stainless steel pipe clamps, alignment bar, and coupling compound. SE16C - Includes set of stainless steel pipe clamps, alignment bar with a built-in ruler, and coupling compound |
| Transducer Cables | Triaxial, 7.6 m (25 ft) with BNC connectors and seal jackets; extendable up to 150 m (500 ft) |
| Hazardous Locations |
Non-incendive for Class I Div 2, Groups A, B, C, D Optional: Intrinsically safe for Class I Div 1, Groups C, D |
VN 2618 
BR 2092 
US 1197 
IN 532 
SG 523 
GB 342 
CA 276 
HK 271 
