TWIN CRYSTAL ULTRASONIC PROBES
Cygnus twin crystal (dual element) probes are for use with the gauge in Single-Echo or Echo-Echo modes.
The probe face is divided into two: one semi-circle transmits the ultrasound energy and the other receives it back.
They have a hard wear face which will eventually wear down. The gauge will automatically “Zero” the probe to compensate for wear (until there is excessive wear when the probe should be replaced). The gauge will indicate when the probe needs changing with a warning message.
In Echo-Echo mode, up to 1 mm (0.04 in) of coating can be read through and ignored. Single-Echo mode can only be used on bare surfaces or where coatings have been removed.
The T5B twin crystal 5 MHz 8 mm (0.315 in) probe is recommended for the majority of applications in Single-Echo and Echo-Echo modes.
Probe ID Number | Frequency | Face Size | Connector Type | Range in Steel in Single-Echo Mode (not through coatings) | Range in Steel in Echo-Echo Mode (through coatings up to 1 mm (0.04 in)) | Typical Application | |
| T5B | 5.0 MHz | 8 mm (0.315 in) | Twin Lemo 00 | 1.5 – 200 mm (0.059 – 7.900 in) | 4 – 50 mm (0.160 – 2.000 in) | General purpose Most metals | |
| T2C | 2.0 MHz | 13 mm (0.51 in) | Twin Lemo 00 | 2.5 – 250 mm (0.098 – 10.00 in) | 5 – 50 mm (0.200 – 2.000 in) | Attenuative materials, cast irons and plastics | |
| T7A | 7.5 MHz | 5 mm (0.2 in) | Integral Cable | 0.8 – 50 mm (0.031 – 2.000 in) | 3 – 25 mm (0.120 – 1.000 in) | Thin metals and small diameter pipes | |
| Gauge Type | |||
| Probe Type | C2+ | C4+ | C6+ |
| Gauge has Twin Lemo 00 Connector | |||
| T5BT2C | 004-0411 Twin Lemo 00 to Twin Lemo 00 | ||
| T7A | Integral Cable | ||
For the DIVE gauge, the probes are fitted with integral cables.
