SINGLE CRYSTAL ULTRASONIC PROBES
Cygnus single crystal probes are for use with the gauge in Multiple-Echo mode to read through and ignore coatings.
These have one piezo-ceramic crystal. This crystal both sends and receives the ultrasound energy.
The S2C single crystal 2.25 MHz 13 mm (0.51 in) probe is recommended for the majority of applications and can be used to read through coatings up to 20 mm (0.79 in) thick with the gauge in Deep Coat mode.
Probe ID Number | Frequency | Face Size | Band / Face Color | Connector Type | Range in Steel | Typical Application | |
| S2C | 2.25 MHz | 13 mm (0.51 in) | Red Band |  | BNC | 3 – 250 mm (0.120 – 10.00 in) | Standard probe supplied, best for all round measurement of wall thickness with corrosion through coatings |
| S2D | 2.25 MHz | 19 mm (0.75 in) | Red Face |  | BNC | 3 – 250 mm (0.120 – 10.00 in) | Large flat plates with corrosion and/or through thick coatings |
| S3C | 3.5 MHz | 13 mm (0.51 in) | Orange Band |  | BNC | 2 – 150 mm (0.080 – 6.000 in) | Measuring wall thickness down to 2 mm (0.08 in) with corrosion through coatings |
| S5A | 5.0 MHz | 6 mm (0.24 in) | Black Face |  | Lemo 00 | 1 – 50 mm (0.040 – 2.000 in) | Small diameter pipes and boiler tubes / heat exchangers |
| S5C | 5.0 MHz | 13 mm (0.51 in) | Black Band |  | BNC | 1 – 50 mm (0.040 – 2.000 in) | Measuring wall thickness down to 1 mm (0.04 in) |
All Cygnus single crystal probes have a protective membrane fitted in front of the probe face to protect it from damage during use on rough corroded surfaces. A thin film of membrane couplant sits between the membrane and the probe face to allow the ultrasound to pass through. The membrane also helps the probe face “mold” to uneven corroded surfaces aiding measurement.
The performance of the probe depends on the condition of the membrane and how well it has been fitted. Cygnus recommends membranes are replaced frequently as a precaution or at the first sign of any scoring, tearing or damage. Please visit our Technical Downloads page to see the probe membrane fitting and maintenance video and instructions.
Membranes are available in two materials, the standard Polyurethane membrane is suitable for surface temperatures up to 75°C (167°F), the Teflon membrane is suitable for surface temperatures up to 150°C (302°F) with a maximum contact time of 5 seconds.
STANDARD POLYURETHANE (75°C (167°F)) PACK OF 20
TEFLON (150°C (302°F)) PACK OF 10
SINGLE CRYSTAL PROBE CONNECTORS (IF NOT POTTED WITH INTEGRAL CABLE)
13 mm (0.51 in) and 19 mm (0.75 in) single crystal probes have a BNC connector
5 MHz 6 mm (0.24 in) single crystal probes have a Lemo 00 connector.
CABLES FOR USE WITH SINGLE CRYSTAL PROBES (THAT AREN’T POTTED WITH INTEGRAL CABLES)
STANDARD POLYURETHANE (75°C (167°F)) PACK OF 20
| Order Code | Probe Size | Size of Head inc. Knurled Ring | Physical Size of Membrane (approx.) |
| 001-3702 | 6 mm (0.24 in) | 18 mm (0.71 in) | 14 mm (0.55 in) |
| 001-3701 | 13 mm (0.51 in) | 24 mm (0.94 in) | 21 mm (0.83 in) |
| 001-3700 | 19 mm (0.75 in) | 30 mm (1.18 in) | 28.5 mm (1.12 in) |
TEFLON (150°C (302°F)) PACK OF 10
| Order Code | Probe Size | Size of Head inc. Knurled Ring | Physical Size of Membrane (approx.) |
| 001-4873 | 6 mm (0.24 in) | 18 mm (0.71 in) | 14 mm (0.55 in) |
| 001-3701 | 13 mm (0.51 in) | 24 mm (0.94 in) | 21 mm (0.83 in) |
| 001-3700 | 19 mm (0.75 in) | 30 mm (1.18 in) | 28.5 mm (1.12 in) |
SINGLE CRYSTAL PROBE CONNECTORS (IF NOT POTTED WITH INTEGRAL CABLE)
13 mm (0.51 in) and 19 mm (0.75 in) single crystal probes have a BNC connector 
5 MHz 6 mm (0.24 in) single crystal probes have a Lemo 00 connector 
CABLES FOR USE WITH SINGLE CRYSTAL PROBES (THAT AREN’T POTTED WITH INTEGRAL CABLES)
| Gauge Type | |||||
| Probe Type | C2 | C4 | C2+ | C4+ | C6+ |
| Gauge has Lemo 1 | Gauge has Twin Lemo 00 Connector | ||||
S2C S2D S3C S5C | 004-0406 Lemo 1 – BNC | 004-0401 Lemo 00 – BNC | |||
| S5A | 004-0401 Lemo 1 – Lemo 00 | 004-0412 Lemo 00 – Lemo 00 | |||
For DIVE, Underwater, ROV Mountable, Intrinsically Safe and Heavy Duty gauges, probes with integral cables fitted are supplied.
