AI-Tek Instruments 70085-1010-412 is a passive variable-reluctance speed sensor in the 70085 Series. It has no moving parts and generates its own output from the changing magnetic reluctance produced by a passing ferrous target. The official catalog lists a 6.000 in thread length and a 10 ft lead for this hazardous-location configuration.
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Technology
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Passive magnetic variable reluctance.
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Moving parts
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None.
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Self-powered operation
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No external sensor supply is required.
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Thread length
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6.000 in (152.40 mm).
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Lead length
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10 ft (3.05 m).
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Polarity
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White lead positive.
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Housing ground
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Green/yellow tracer.
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As a ferrous gear tooth approaches and leaves the magnetic pole piece, magnetic reluctance changes and an alternating voltage is induced in the coil. Output level depends on target speed, air gap and target geometry. The sensor therefore requires selection against the intended gear and operating speed.
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Standard output
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54 V peak-to-peak under the catalog reference condition.
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Guaranteed-point output
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13.4 V peak-to-peak.
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DC resistance
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240 ohm maximum.
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Typical inductance
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30 mH reference.
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Operating temperature
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-65 to +100 degrees C.
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Lead length
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10 ft (3.05 m).
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Net weight
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14 oz maximum.
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Reference target
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Performance based on an 8 D.P. gear.
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Thread length
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6.000 in (152.40 mm).
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A passive variable-reluctance sensor contains a permanent magnetic circuit and coil. Passing ferrous teeth vary the magnetic reluctance and induce an alternating voltage. Signal frequency follows tooth-passing frequency, while amplitude varies with surface speed, gap and target geometry.
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Series
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AI-Tek 70085 passive speed sensors.
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Hazardous-location rating
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UL and CSA listed for Class I, Division 1, Groups A-D and Class II, Division 1, Groups E-G; temperature code T3C.
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ATEX rating
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Group II, Category 3G, Zone 2.
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Output dependency
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Use the AI-Tek calculator to confirm expected output for the application.
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Condition
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New, used or refurbished status is subject to verification.
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Current photographs
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Available on request.
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Stock and dispatch
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Confirm before quotation.
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Testing and warranty
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Available on request and subject to verification.
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Is physical stock confirmed? Confirm before quotation.
Is the item new, used or refurbished? Subject to verification.
Can current item and nameplate photographs be supplied? Available on request.
What warranty applies? Available on request and stated in the quotation.
What is the dispatch time? Confirm before quotation.
Has the item been tested? Test status and scope are subject to verification.
Which payment methods are accepted? Available on request and stated in the proforma invoice.
How quickly is a quotation issued? Response timing depends on configuration and availability verification.
How is the transaction documented? Request an itemized quotation, company details, invoice, current photographs and available shipment records.
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