Metal Detectors · Dual-head

MD-8500S Dual-Head Digital Metal Detector

Name: MD-8500S Dual-Head Digital Metal Detector
Brand: Shanghai Dingli Needle Detector Instrument Co., Ltd.
SKU: MD-8500S

Dual-head

A dual-head digital metal detector for food, pharmaceutical, medical, cosmetic, toy, textile, plastics and packaging industries, with two heads in series.

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CE Certified
Customizable

Product Overview

The MD-8500S uses digital signal processing for stronger stability and a wider detection range, detecting iron, stainless steel, copper and aluminum — CE certified. Two detection heads are arranged in series on the same conveyor, so each product passes through two detection zones in turn, further reducing the risk of missed detection.

Technical Specifications

MD-8500S
Model		MD-8500S
Specifications		4008	4010	4012	5015	5020	5025
Detection Width		400 mm	400 mm	400 mm	500 mm	500 mm	500 mm
Detection Height		80 mm	100 mm	120 mm	150 mm	200 mm	250 mm
Sensitivity (Empty)	Fe	0.7 mm	0.8 mm	1.0 mm	1.2 mm	1.5 mm	2.0 mm
	Non Fe	1.2 mm	1.5 mm	1.5 mm	2.0 mm	2.5 mm	3.0 mm
	Sus	1.5 mm	1.5 mm	2.0 mm	2.5 mm	3.0 mm	3.5 mm
Belt Width		370 mm	370 mm	370 mm	470 mm	470 mm	470 mm
Belt Speed		Default 26 M/min, customizable
Display and Operation		LCD monochrome backlit display, key panel control
Alarm Method		Audible & visual alarm, belt stop, optional alarm light and sorter (rejection device)
Supply Voltage		220V 50-60Hz 1P customizable

Specifications are for standard models; other sizes and special requirements are customizable. Detection accuracy is measured without product effect or environmental interference; actual accuracy depends on the product and operating environment.

Features

Two detection heads in series on the same conveyor belt — products pass through two detection zones in turn
Detects iron, stainless steel, copper and aluminum
LCD monochrome display with keypad control
Audible & visual alarm, belt stop; optional alarm light and sorter (rejector)
CE certified

Applications

Industries & products: Food, Pharmaceutical, Medical, Cosmetics, Toys, Textile, Rubber & Plastic, Packaging。

Food
Pharmaceutical
Medical
Cosmetics
Toys
Textile
Rubber & Plastic
Packaging

FAQ

Can it detect metal inside aluminium foil packaging?

Only the MD-9500 / MD-9500A is designed for that. Aluminium foil is conductive and saturates the field of a conventional metal detector — normal units either lose nearly all sensitivity or alarm on every pack. The MD-9500 uses a dedicated detection method for foil-laminated packaging and reaches Fe Φ0.7 mm at a 400 × 80 mm opening.

Can it detect stainless steel, or only iron?

All three materials are detected, with different sensitivities. Taking the MD-8500 with a 400 × 80 mm opening as an example, the empty-machine values are Fe Φ0.7 mm, non-Fe Φ1.2 mm and SUS Φ1.5 mm; sensitivity falls as the opening grows, down to Fe Φ2.0 mm at 500 × 250 mm. Stainless is the hardest: if your main risk is broken mesh or worn blades, set and verify the SUS channel separately rather than relying on the iron test card.

How do I pick the detection opening size?

Match it to your conveyor width and product height, with clearance. The MD-8500 comes in six sizes: 400×80, 400×100, 400×120, 500×150, 500×200 and 500×250 mm; the MD-9500 foil version offers 400×80 or 500×100 mm. With the same electronics, a larger opening means lower sensitivity, so do not oversize it "for future use".