bids are invited for technical specifications of hhmd as per mha instructions dated 21 august 2012 (copy enclosed) s.n description- as per mha instructions dated 21.08.2012(copy enclosed) 1. should have one switch operation. 2. should have ultimate sensitivity. 3. should be simple to use with no major adjustments. 4. should be rugged, high-impact abs case with reinforced coil compartment. 5. should be able to detect ferrous and nonferrous metals and capable to detect mediumsized pistol from150-230mm;large knife from120-150mm, razor blade and box cutter from25-75mm; and tiny jewellery from25-35mm. 6. should be capable of scanning large 6.5” scan surface for quick, thorough scanning. 7. should be easy to change 9v rechargeable battery, ni-mh 8. should have sharp audible alarm and bright red led light indicates the detection of metal. 10. should have three led’s indicating on; low battery and alarm for metal. 11. operating temperatures from 0°c to 55°c 12. humidity to 95% non-condensing. 13. should be provided with single 9 volt rechargeable battery upto 40hours running on single charge. 14. battery protector-to be provided against damage due to reverse polarity. 15. scan rate minimum 3to24 per seconds. 16. tuning-automatic to ensure equal results on wide range of metals and alloys 17 detection: ferrous, non-ferrous & alloys 17. dimensions probewidth:120mm max.body width:65 mm max.length:500mm maxweight: maximum500grams.