Key Benefits:
* A light you can count on wherever your travels take you
* Pays for itself by never needing batteries or maintenance
* Compact, lightweight and durable
* Virtually indestructible – provides years and years of service
* Great emergency signaling device – can be seen for miles
* Luminescent switch glows for hours allowing for easy location and operation
* 30 day money back guarantee – Complete satisfaction - No purchase risk
Product Description:• Length: 7 inches (18 cm)
• Head Dia: 1.75 inches (4.4 cm)
• Handle Dia: 1.35 inches (3.4 cm)
• Weight: 7 ounce (196 gr)
• Housing Material: Polycarbonate
• Lens Material: Acrylic
• Color: Emerald Green
Engineered in the USA
Ideal For * Outdoor Recreation - Whether hiking, backpacking, or caving, NightStar CS2 will never failed to light the path ahead.
* Emergency Preparedness - NightStar flashlights, with unparalleled dependability, have proven themselves in dire circumstances and in severe conditions around the world.
* Boating – NightStar flashlights are waterproof, corrosion proof and unsinkable.
* Organization Support – NightStar CS2 is the perfect gift for any Boyscout, Girlscout or club member.
Features:
* 40 seconds of shaking provides up to 20 minutes of light
* Illuminates a 12-ft (4m) diameter area at a distance of 50-ft (16m)
* High Strength Polycarbonate Housing
* Exclusively uses White StarCore LED technology rated at 15,000 mcad
* Efficient and silent magnetic repulsion charging system
* Gold-Film high energy capacitor
* Luminescent, magnetic switch
* Waterproof to a depth of 1000-ft (305 m)
* Corrosion Resistant
* Floats with Lens Pointing Up
* Backed by a 5-year Warranty
Technical Details
With only one moving part, the NightStar CS2 flashlight transforms simple motion into light. When gently shaken, a super high-strength rare earth magnet passes smoothly through a wire coil, efficiently generating electrical energy. A heavy duty capacitor, which can be recharged repeatedly, stores the energy and delivers power to a Super Bright StarCore® LED. Thirty seconds of shaking provides 20 minutes of light. In total darkness, NightStar CS2 will illuminate a 12-foot diameter area at 50 feet. NightStar's state of the art components are contained within a rugged, waterproof housing ensuring operation even in the most severe conditions.
The Fusion-Nd® rare earth magnets used in NightStar are made from a unique combination of neodymium, iron and boron fused together in special sintering process. The crystalline structure of these materials yields the strongest grade and longest lasting magnets in the world.
The Gold-Film capacitor operates in hot and cold environments, can be recharged several hundred thousand times, and will not corrode.
The solid state StarCore® LED (Light Emitting Diode) is practically unbreakable, has a rated lifetime of tens of thousands of hours, and will produce 1000 foot-candles of light at peak brightness.
The switch's outer housing and slider are made from a special luminescent material that will glow for more than 8 hours after only a few minutes exposure to room or sun light. This unique feature allows NightStar to be easily found and operated in dark environments. In addition, the switch slider holds a small Fusion-Nd magnet that activates a Reed switch mounted on the inside circuit board. This unique design provides lasting operation, is inherently waterproof, and eliminates any spark hazard.
The polycarbonate housing and internal Powercell can withstand extreme abuse. As a result, NightStar will light the way for years under the harshest conditions. The new Cobalt blue and Emerald green housings of NightStar 3 and NightStar CS2 provide an added advantage by eliminating light scatter and improving night vision.
Specifications
Temperature
Storage: -50F (-45C) to 140F (60C)
Operation: -40F (-40C) to 130F (55C)
Impact Resistance
Fully operational after random repeated drops from a height of 4-ft (1.2m) onto a tile covered concrete surface.
Corrosion Resistance
Operational after 3 days immersion in solutions of salt water, isopropyl alcohol, ammonia, phosphoric acid *, acetic acid *, drain cleaner *, Ajax *, motor oil and diesel fuel (* 10% solutions).
Submersion
Operational at an ocean depth of 1000-ft (305 m). [Equivalent pressure crush point 434 PSI]
Hazardous Gas Certification
Meets all test criteria for MIL-STD-810F, Test Method 511.4: Military Standard Reliability Program. Gas Mixtures tested: Acetylene (Group A), Hydrogen (Group B), Ethylene (Group C), Hexane (Group D), Natural Gas (Group D), Aviation AV/Gas 100 / 130.
Electromagnetic Compatibility
Conforms to Council Directive 89/336/EC. Measured RF levels are far below limits for all frequencies.
Questions and Answers
NightStar represents the most reliable hand held light source ever made. NightStar's unique and fascinating design has inspired people to ask the following excellentquestions:
"Why do NightStar 3 and NightStar CS2 require different amounts of shaking?"
First of all, NightStar 3 and NightStar CS2 both use a 1.5 farad capacitor. The time it takes to recharge the capacitor is dependent upon the amount of energy dumped into it per shake of the flashlight. Because NightStar 3 uses a much larger magnet, the magnet field line density is far greater. Coupled with this is that NightStar 3 has a much larger coil, which has a larger cross sectional area and more windings. Finally, because of the longer throw distance in NightStar 3, the magnet can travel faster as it passes through the coil. Ultimately then, the energy pulse generated as the magnet goes through the coil in NightStar is greater than in CS or RS, and is proportional to (N)(A)(B)(v), where N is the number of coil windings, A is the cross section area of the coil, B is the magnetic field strength, and v is the velocity of the magnet. As you can see, the capacitor in NightStar 3 will charge more quickly then the capacitor in NightStar CS2.
"Why is NightStar 3 brighter than NightStar CS2 ?"
The difference in brightness between NightStar 3 and NightStar CS2 has to do with beam divergence. NightStar 3 has a more collimated beam, and therefore more concentrated. The reason for this is that the distance from the LED to the lens is greater in NightStar 3 than CS2. In NightStar 3 the distance is approximately .70" (which is very close to the separation required to obtain a collimated beam). In NightStar CS2 the distance is only .55". In terms of overall light output from the LED however, the two lights are nearly the same because their circuitry is identical.
"How is the charging magnet reflected at either end of the flashlight?"
Neodymium magnets are mounted at both ends of the flashlight and are oriented to repel the charging magnet. The magnetic repulsion recoil system smoothly decelerates and accelerates the charging magnet back through the coil without loss in mechanical energy. Consequently, the loss of energy due to friction is extremely small and is only the result of the cylindrically shaped nickel-plated charging magnet sliding through a polished tube. Kinetic energy is therefore efficiently coupled into electrical energy with almost no degradation to the system. Lasting performance is obtained with this design.
"What are the magnets made of and how are they magnetized?"
The magnet is an anisotropic sintered ceramic containing neodymium, iron and boron (NdFeB). The anisotropic nature of the material (meaning that it has properties that differ according to the direction of the measurement) is due to the tetragonal crystalline structure of the NdFeB molecule. The magnetic dipole associated with each crystal lattice site aligns itself along a well-defined axis within the bulk material. As a consequence of its molecular magnetic structure, the material is remarkable in two ways: First, it possesses a high-density magnetic field because of the alignment uniformity of the magnetic dipoles; and second, it will hold this field for an extremely long time even when oriented for repulsion with another magnet or subjected to extreme temperatures. All of the magnets in NightStar were initially slugs or disks of ceramic NdFeB. They were then plated with either nickel (the charging magnet and the switch activation magnet) or zinc (the repulsion magnets mounted on either end of the light). The plating, which gives the magnets a metallic look, serves to protect the magnet from corrosion, chipping and scratching. Nickel is a standard, tough, smooth coating and zinc protects the magnet and provides an excellent bonding surface. The zinc plated repulsion magnets are pressed and epoxied into pockets and will therefore only come out when the flashlight is totally destroyed. Finally, the coated ceramic pieces are placed in a toroid chamber that converts electricity into an extremely high strength magnetic field. The ceramic pieces become magnetized within a few seconds and will remain so for thousands of years.
"How does the switch work?"
Inside the switch is a small magnet. As the switch is moved forward the magnet slides over and activates a reed switch mounted on the circuit board inside the flashlight. When the reed switch is activated (or closed) energy in the capacitor flows through the StarCore LED. This design feature has several advantages over conventional mechanical switches used in other flashlights. The most significant advantage is reliability; the simple sliding plastic switch does not corrode or wear out and the reed switch is rated at over 1 million cycles. By comparison, mechanical push button or toggle switches have components that corrode and springs that fatigue after limited on/off cycles. Another key advantage to NightStar's switch design is that it does not require a watertight seal because the magnet on the outside is able to activate the reed switch through the plastic housing. Finally, because the electrical circuit is not exposed to the outside world (as with a typical mechanical switch) there is no possibility of igniting combustible materials.
"Why is the housing made from plastic?"
Most importantly, any type of metallic housing will prevent the charging magnet from moving effectively through the coil. This is due to free electron eddy currents being set up in the metal housing when the charging magnet travels through the barrel. Consequently, magnetic fields generated by the eddy currents in the housing oppose the magnetic field of the charging magnet. The faster the charging magnet tries to move, the stronger the opposing fields will be in the housing. Therefore, the charging magnet will never pass through the coil with enough speed to charge the energy storage capacitor. The plastic housing is superior to a metal housing in several other ways as well. The material and manufacturing costs of plastic are far less expensive then aluminum (aluminum is a likely choice for a metal housing). Additionally, NightStar's plastic housing will never rust or oxidize and weighs less then an aluminum housing that would provide the same amount of crush resistance. The plastic used in NightStar is an alloy of polycarbonate and ABS (Clear NightStar however, is made of pure polycarbonate; polycarbonate/ABS is not available in clear). Polycarbonate/ABS was chosen for two reasons: First, it is difficult to break even at cold temperatures; and second, it is unaffected by salt water, mild acids, alcohol, methanol, and ammonia based cleaners and is corrosion resistant when briefly exposed to petroleum products such as gasoline, oil and grease. Clear NightStars are not as chemical-resistant against petroleum products but have slightly higher impact strength.
"Why doesn't NightStar interfere with night vision?"
NightStar doesn't affect your night vision due to the fact that it's not overwhelmingly bright. If you're using a Maglite for example, and you're looking at the area illuminated by its beam, your eye's natural tendency is to aperture down to obtain a comfortable light level. If you now look away from the beam, everything looks dark and will remain so until the eye's iris dilates to allow more light in. With NightStar, the iris remains open to the point where objects outside the beam are still visible. This is one of the reasons the military prefers NightStar for extended night time operations.
