SH-D12/12 Sumtak U-Type High Frequency Gear-Tracking Sensor
SH-D12/12 Sumtak U Type High Frequency Non-Contact Gear-Tracking Sensor
The Sumtak SH-D12/12 is a rugged, non-contact 12 V pulse sensor that converts gear-tooth motion into crisp rectangular signals at frequencies up to 5 kHz—perfect for high-speed feedback in CNC spindles, elevators, textile rollers and packaging lines. Its compact 0.07 kg body and 1 m lead fit easily into tight retrofits, while the double-pulse output provides both speed and direction data to servo drives, PLC high-speed counters and tachometers through a simple three-wire hookup (+12 V, 0 V, pulse). With a broad 0 °C to +80 °C operating window, oil- and dust-resistant construction, and high shock-and-vibration immunity, the SH-series outperforms mechanical tachogenerators and ensures long, maintenance-free life. Precise 2.5 mm tooth-pitch tolerance keeps timing stable for synchronized multi-axis motion, making it equally valuable in flow-meters, card readers and general factory automation wherever exact digital RPM or positional feedback is required.
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Brand: Sumtak
Model: SH-D12/12
Origin: Japan
Sumtak SH-D12/12 Sensor – Overview
The Sumtak SH-D12/12 belongs to the company’s SH family of high-frequency, non-contact gear-tracking sensors. Mounted close to a rotating gear, it generates two square-wave signals (channels A and B) that are 90° out of phase. A PLC, drive, or counter card can use these signals to determine both speed and rotation direction, so the device is also known in the field as a speed pickup, Optcoder, or gear-tooth encoder.
Typical Applications and Purposes
| Industry / Machine | Main Purpose | Benefit |
|---|---|---|
| Textile machines (knitting, weaving, winders) | Yarn-feed & spindle speed control | Keeps fabric quality and yarn tension constant |
| Printing & packaging lines, corrugated presses | Web-tension and register synchronisation | Prevents print mis-register, lowers waste |
| CNC machine tools & spindles | Spindle feedback, tool synchronisation | Enables precise speed-controlled machining |
| Robotics / servo drives | Motor speed & direction feedback | Improves closed-loop position accuracy |
| Conveyors, cranes, elevators | Speed monitoring, overspeed protection | Enhances safety and process uptime |
| Fillers, packers, mechanical presses | Crank / cycle synchronisation | Shortens cycle time, ensures product consistency |
Key Technical Specifications
| Feature | Value / Note |
|---|---|
| Supply voltage | +12 V DC ± 10 % |
| Output type | Dual square-wave (channels A & B) |
| Cut-off frequency | 5 kHz standard (8 kHz option) |
| Max gear speed | ≤ 1 800 rpm (with mating gear) |
| Housing size | 30 mm (L) × 21 mm (W) × 26 mm (H) |
| Ingress rating | IP66 (dust-tight, high-pressure water-jet proof) |
| Operating gap | Gear clearance ≈ 2.5 ± 0.1 mm; pulses = 2 × tooth count |
| Mounting | M3/M4 flanged screws, axial mis-alignment ≤ 0.02 mm |
How it works
An internal magneto-optic pickup detects each tooth/space pair as the gear rotates. Because channels A and B are phase-shifted by 90°, the controller counts pulses for speed and compares phase order for direction.
Why Choose the SH-D12/12?
-
Wide bandwidth (5–8 kHz) keeps signals clean even on fine-pitch gears.
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IP66 aluminium body survives oil, dust, and high-pressure wash-downs.
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Compact footprint (30 × 21 × 26 mm) suits tight installation envelopes.
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True non-contact measurement means zero bearing load and minimal mechanical wear.
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Quadrature output delivers high resolution plus direction info and can be wired to overspeed relays for added protection.
Summary
With its high-frequency response, rugged IP66 housing, and dual-pulse quadrature output, the Sumtak SH-D12/12 is a reliable choice wherever precise gear-based speed and direction feedback is required—textile lines, printing presses, CNC spindles, servo drives, conveyors, and more.
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