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SCX Tuning Fork Level Switch - SC1420 - SCX10000-BAB is a FINETEK SCX tuning-fork point level switch designed to detect the presence or absence of material at a defined point in a vessel, tank or process line. The sensor uses a piezoelectric tuning-fork element and solid-state electronics. When the fork is covered by the target medium, the vibration is damped and the electronic feedback changes; the switching electronics then changes the output state to indicate material presence. This operating principle provides max/min point-level control without a mechanical float.
The tuning-fork element is driven at its specified vibration frequency. Material contact changes the fork response, allowing the electronics to identify a level condition. FineTek states that sensitivity can be selected for different media densities and that the design can be used for liquids, powders and solids. The SCX family is suited to applications where a dependable point-level signal is required for process control, high/low alarm or dry-run protection.
The SC14 specification uses an aluminum IP65 sensor housing with SUS 304, SUS 316 or SUS 316L probe material, a 1 in PT mounting connection and two 1/2 in NPT conduit connections. The standard documentation specifies a maximum vertical load on the rod of 177 in-lb (20 Nm) and process pressure from -1 to 600 PSI (40 bar). The SC1410 and SC1420 configurations use extended fork arrangements, while SC1740 and SC1741 are identified as SC17 Ex-proof configurations in FineTek's model/order-code documentation.
The standard SCX specification accepts 20 to 250 VAC/VDC at 50/60 Hz and has a listed power consumption of 10 VA. Outputs can be provided as SPDT relay contacts rated at 5 A/250 VAC or SSR MOSFET output rated at 400 mA/60 VAC/VDC, with one or two output sets depending on configuration. High/low fail-safe selection and high/low sensitivity selection are provided.
FineTek specifies an ambient temperature range of -40 to 60 °C and a process temperature range of -40 to 130 °C for the standard SC14 specification. The minimum sensed material density is listed as ≥0.07 g/cm³ for solids and ≥0.7 g/cm³ for liquids. The response delay is specified as 0.6 second for operation and 1 to 3 seconds for reset, and the fork vibration frequency is 350 to 370 Hz.
| Specification | Details |
|---|---|
| Product family | FINETEK SCX2 Tuning Fork Level Switch |
| Measurement principle | Piezoelectric tuning-fork vibration with solid-state electronic feedback |
| Level detection | Maximum and minimum point-level detection for liquids, powders and solids |
| Level sensor housing | Aluminum / IP65 |
| Probe material | SUS 304 / 316 / 316L |
| Mounting | 1 in PT |
| Conduit | 1/2 in NPT × 2 |
| Maximum vertical load on rod | 177 in-lb (20 Nm) |
| Process pressure | -1 to 600 PSI (40 bar) |
| Power supply | 20 to 250 VAC / VDC, 50 / 60 Hz |
| Power consumption | 10 VA |
| Ambient temperature | -40 to 60 °C |
| Process temperature | -40 to 130 °C |
| Signal output | Relay, SPDT, 5 A / 250 VAC, 1 or 2 sets; SSR (MOSFET) 400 mA / 60 VAC / VDC, 1 or 2 sets |
| Minimum material density sensed | Solid ≥0.07 g/cm³; Liquid ≥0.7 g/cm³ |
| Time delay | 0.6 s operate; 1 to 3 s reset |
| Vibrating frequency | 350 to 370 Hz |
| Fail-safe selection | High / Low |
| Sensitivity selection | High / Low |
| Probe configuration | Tuning-fork extension type |
| Probe extension | 145 to 250 mm |
| Approx. probe diameter | 29 mm |
The SCX family is intended for max/min level detection in tanks, bins, vessels and process tubes. FineTek lists applications across chemical fiber, rubber and tyre, cement, steel, food, pharmaceutical and animal-feed industries, including detection of powders, granular materials and liquids. The exact model and order code should be matched to the required mounting, process temperature, pressure, electrical output and hazardous-area requirements.
| Specification | Details |
|---|---|
| Product family | FINETEK SCX2 Tuning Fork Level Switch |
| Measurement principle | Piezoelectric tuning-fork vibration with solid-state electronic feedback |
| Level detection | Maximum and minimum point-level detection for liquids, powders and solids |
| Level sensor housing | Aluminum / IP65 |
| Probe material | SUS 304 / 316 / 316L |
| Mounting | 1 in PT |
| Conduit | 1/2 in NPT × 2 |
| Maximum vertical load on rod | 177 in-lb (20 Nm) |
| Process pressure | -1 to 600 PSI (40 bar) |
| Power supply | 20 to 250 VAC / VDC, 50 / 60 Hz |
| Power consumption | 10 VA |
| Ambient temperature | -40 to 60 °C |
| Process temperature | -40 to 130 °C |
| Signal output | Relay, SPDT, 5 A / 250 VAC, 1 or 2 sets; SSR (MOSFET) 400 mA / 60 VAC / VDC, 1 or 2 sets |
| Minimum material density sensed | Solid ≥0.07 g/cm³; Liquid ≥0.7 g/cm³ |
| Time delay | 0.6 s operate; 1 to 3 s reset |
| Vibrating frequency | 350 to 370 Hz |
| Fail-safe selection | High / Low |
| Sensitivity selection | High / Low |
| Probe configuration | Tuning-fork extension type |
| Probe extension | 145 to 250 mm |
| Approx. probe diameter | 29 mm |
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