Magneto-Electric Rotation Detector
AP-981
The AP-981 is nitrate-resistant (at concentrations of 10% or less) and has a waterproof construction. While not exclusively for underwater use, it meets protection class 7 (IP X7), meaning it can be used in environments where it may occasionally be submerged.
It incorporates a magnetoresistive element, permanent magnet, DC amplifier, and voltage regulator internally, and is designed as a flux-response type (resistance changes according to magnetic flux), allowing detection of square wave output from ultra-low speeds to high speeds (1 to 20,000 r/min (60 P/R)).
AP-981: Signal cable 1.9 m, directly attached (Terminal: open)
There are two other types of Magneto-Electric Rotation Detector available:
General-purpose type (waterproof/dustproof): MP-9810 →
High-speed type (waterproof/dustproof): MP-9830→
The detection distance varies depending on the module of the detection gear used; a larger module allows for a longer detection distance. The detection distance also depends on temperature; in cases where the ambient temperature fluctuates significantly, the detection distance should be minimized during installation. Note that the detectable range shown in the diagram is when the output waveform duty cycle is within 50% ± 20%.
Magneto-Electric Rotation Detector (MP-9800 series/AP-981) requires alignment of the center of the gear teeth with the alignment mark.
| Detection Method | Magnetoresistive elements and magnetic gears |
|---|---|
| Detection gear | Made of ferromagnetic material (S45C, SS400, etc.), Modules 1-3, tooth width 3 mm or more |
| Detection distance | Gear module |
| Measurement range | 1 Hz～20 kHz |
| Output signal | Square wave "Hi" level: within +5 ± 0.5 V "Lo" level: Below +0.5 V |
| Output Impedance | Approximately 330 Ω |
| Compatible tachometer | TM-4000 series and others |
| Power supply | DC 12±2 V, approximately 40 mA |
| protection circuit | power polarity protection |
| Operating temperature range | −10 ℃～＋70 ℃ |
| -10°C to +50°C (However, in a 10% nitric acid mist atmosphere) |
|
| Withstand voltage | DC 250 V |
| Vibration resistance (current carrying) | Double amplitude 1.2 mm 30 Hz 1 hour each in X, Y, and Z directions |
| Shockproof (non-electric) | 490 m/s 2 X, Y, Z axis directions (3 times each) |
| Outline drawings |  |
| Weight | Approximately 130 g (including signal cord) |
| Signal cable | Nitric acid resistant cord, 1.9 m, directly attached. |
| price | |
| Remarks | The outer material is polycarbonate. Waterproof, conforming to JIS C0920 protection class IPX7. Acid-resistant nitric acid atomized atmosphere usable |
* 20 kHz corresponds to a frequency of 20,000 r/min, assuming a 60 P/R sensing gear is used.