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M1 Mass Standard - knob weights - set (1 mg - 200 g), wooden box.

Motic GM-171 Binocular Gemology Stereo Microscope Magnification Range 7.5X to 50X Observation Tube B (more)inocular Head Optical System Greenough Features - Designed for gemological and precious mineral work - Greenough optical system with 7.5X–50X stereo zoom head - Binocular head inclined at 45° for comfortable viewing - Interpupillary distance adjustable from 52-75mm for user comfort - Diopter adjustment on both eyepieces (+/- 5 diopter) for sight compensation - Widefield WF10X/23mm eyepieces for a large field of view - Zoom system with a 6.7:1 ratio and objectives ranging from 0.75X to 5X - 110mm working distance for flexibility in sample handling - Adjustable iris diaphragm with an aperture range of Ø41mm to Ø2mm The Motic GM-171 Stereo Microscope is specifically designed for gemological and precious mineral analysis, offering a versatile magnification range from 7.5X to 50X. Equipped with a Greenough optical system, this microscope delivers sharp, high-quality images, ideal for detailed examination of gems and stones. The binocular head is inclined at 45°, allowing for ergonomic viewing, while the adjustable interpupillary distance (52-75mm) ensures comfort during extended use. Diopter adjustment on both eyepieces (+/- 5 diopter) provides precise vision correction, and the widefield WF10X/23mm eyepieces offer a broad field of view. This microscope is built for flexibility and ease of use, featuring a 110mm working distance and a 360° rotatable base, which makes handling samples simple and efficient. The adjustable iris diaphragm, with an aperture range from Ø41mm to Ø2mm, enhances the control of lighting conditions. Incident illumination is provided by a 7W fluorescent gooseneck light, while a 6V/30W Quartz Halogen lamp with intensity control ensures bright transmitted illumination with a darkfield option. The GM-171 also comes with a durable aluminum carrying case, a stainless steel wire stone holder, and a dust cover, making it a comprehensive tool for professionals in the gemology field. INCLUDED: The Motic GM-171 Binocular Gemology Stereo Microscope includes: - 45° Binocular Stereomicroscope Head - 45 Degree Binocular Stereomicroscope Head - Gemology Tilting Base - Wire Gem Holder - Aluminum Carrying Case - Power Cord - Operator's Guide - Manufacturer's Documentation - 5 Year Manufacturer's Warranty

Ohaus Endeavor 5000 Series e-E51LD0420 AM Light Duty Orbital Shaker Speed Range 50 to 300 RPM Maximu (more)m Capacity 8.8 lb. (4 kg) Orbit 20 mm Features - Compatible for use in incubators and cold rooms, enhancing versatility across experimental conditions - Features a triple eccentric drive and maintenance-free brushless DC motor for stable, long-term shaking - Bright, backlit LCD display with easy-to-navigate menu for speed, time settings, and advanced features - Integrated safety mechanisms with overload and unbalanced detection to protect samples - Equipped with RS232 interface for two-way communication, enabling data logging and unit control - Durable construction with chemical-resistant polymer housing and sturdy aluminum tray - Small footprint design with visual and audio alarms, and advanced microprocessor control for gradual speed increase to avoid splashing Click Here to View Product Video The Ohaus Endeavor 5000 Series Light Duty Orbital Shakers are a trusted choice for everyday laboratory shaking needs, designed to accommodate a wide range of applications from microbiology and molecular biology to food science and chemistry. These shakers come in three models, featuring either a 3 mm orbit, a 20 mm orbit, or a specialized microplate configuration, ensuring versatility for various research requirements. Each model is compatible with use in incubators and cold rooms, highlighting their adaptability to different experimental conditions. The shakers boast a durable, chemical-resistant polymer housing and a sturdy aluminum tray with multiple attachment points for accessories, making them both robust and easy to clean. A key feature of the Endeavor series is its triple eccentric drive and maintenance-free brushless DC motor, providing stable and accurate shaking over long periods. Safety is enhanced with integrated overload and unbalanced detection systems to protect valuable samples. The series is equipped with a bright, backlit LCD display that shows speed and time settings, including a timer with both count-up and count-down functions that automatically shuts off shaking when time expires. An easy-to-navigate menu and simple knob control facilitate operation, while the inclusion of a tray with a non-slip rubber mat, flask clamps, and tube racks enhances its utility. An RS232 interface allows for two-way communication for comprehensive data logging and control, ensuring these shakers meet the demands of modern laboratories. Additionally, design features such as visual and audio alarms, a small footprint to conserve bench space, and advanced microprocessor control for gradual speed ramping further underscore the thoughtful engineering behind the Ohaus Endeavor 5000 Series. Optional accessories like a universal platform and over 20 flask clamps and tube racks are available, making these shakers a versatile and essential tool for a variety of scientific studies. INCLUDED: The Ohaus Endeavor 5000 Series e-E51LD0420 AM Light Duty Orbital Shaker includes: - 11.75 x 8.75 in. Non-Skid Rubber Mat Platform - Power Cord - Operator's Guide - Manufacturer's Documentation - 2 Year Manufacturer's Warranty

Max capacity: 6x 50 ml Allowed density: 1.2 kg/dm³ Speed: 18000 rpm Force: 25718 rcf Kinetic energy: (more) 8100 Nm Dimensions (WxDxH): 275 x 330 x 247 mm Weight: 11 kg Equipped with: 1x Hettich 1114 swing out rotor (max 5000 rpm) 8x Hettich 1122 bucket (tube capacity (ØxL): 17.5 x 53 mm)

The offered instrument / system is fully functional tested and ready to use. FURTHER DETAILS TO FOLL (more)OW