Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Instrument Expert
Original factory packaging
Service Hotline：
(+86)010-52867771
Updated:2025-03-13
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User's Manual Datasheet
The TTFM 6.1 Transit-Time Flow Meter is ideal for treated clean water, raw water, cooling water, chemicals, hydraulic oil, low-conductivity water, water/glycol solutions, and diesel and fuel oils. The unit works by measuring the time-of-flight difference for ultrasonic sound pulses transmitted from one transducer to another. The time between transmitted and received signals is measured by the flow meter. Mount the TTFM 6.1 Transit-Time Flow Meter ultrasonic transducers on the outside of a pipe and use the built-in 5-button keypad to enter the pipe material, outer diameter, wall thickness, and fluid type. The TTFM 6.1 will display the correct transducer separation distance and mounting method.
With the TTFM 6.1 Transit-Time Flow Meter, you never need to be an expert in non-contacting flow measurement to get the best results in your application. Let us help you accurately measure the flow rate of relatively clean, non-aerated fluids in full pipes.
Easy to Choose
With only three easy-to-select transducer sizes that work on all common pipe materials and options tailored to fit your application, the TTFM 6.1 is the easiest choice to specify for your next clean-liquid flow application.
Easy to Use and Maintain
With interchangeable clamp-on transducers, standard mounting hardware, and a quick setup menu, installation is quick and shutdown-free. Perfect for both retrofits and new installations. With no moving parts, there is little to no maintenance required, and with solid-state components, there is no drift in performance over time, ensuring accuracy and peace of mind.
Easy Assistance Anywhere
With real-time sales and application support directly from Pulsar Measurement, world-class assistance is just a phone call away. For applications that require periodic recalibration, we're ready to support you with our cost-conscious calibration services and fast turnaround service.
Features
Three easy-to-select transducer options covering 15 mm to 1,200 mm nominal pipe diameters.
Transducers work on all common pipe materials.
Standard mounting hardware makes novice installers look like experts.
Transducers simply strap to the outside of the pipe, meaning no wear and tear, and no shutdown to install.
Easy-to-contact and knowledgeable staff is here to help you before, during, and after installation.
Analog, pulse, and serial communication options to meet your specific application needs.
Standard 26 million point data logger and free Logging Software make data management and reporting fast and easy.
All transducers are approved for use in hazardous locations.
Specifications
| 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 |
| Flow Velocity Range | ±0.02 m/s to 12.2 m/s (±0.07 ft/s to 40 ft/s) |
| Accuracy |
±1% of reading from 0.46 m/s to 12.2 m/s (1.5 ft/s to 40
ft/s); ±0.0046 m/s (±0.015 ft/s) for velocities
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, 1 kΩ load maximum |
| 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 | |
| Pipe Diameter (Recommended) |
SE16A: 15 mm to 40 mm (0.5 in to 1.5
in) SE16B: 50 mm to 250 mm (2 in to 10 in) SE16C: 300 mm to 1,200 mm (12 in to 48 in) |
| Pipe Diameter (Suitable For) |
SE16A: 15 mm to 150 mm (0.5 in to 6
in) SE16B: 50 mm to 1,200 mm (2 in to 48 in) SE16C: 100 mm to 1,200 mm (4 in to 48 in) |
| 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, built-in ruler, and
coupling tape SE16B: Includes a set of stainless steel transducer brackets, clamps, alignment bar, and coupling tape SE16C: Includes set of stainless steel transducer brackets, clamps, alignment bar with a built-in ruler, and coupling tape |
| Transducer Cables | Triaxial, 7.6 m (25 ft) with BNC connectors and seal jackets; extendable up to 152.4 m (500 ft) |
| Hazardous Locations |
Certified Non-incendive for Class I, Div 2, Groups A, B, C, D |
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