Noise / acoustic calibrator model: GJY4 / CEL110
Main features ☆ Highly stable acoustic performance ☆ Double calibration sound pressure level 94dB and 114dB (Type 1)
☆ Simple to use ☆ Ergonomic design ☆ Complies with IEC60942: 2003 and ANSIS1.40-1984 standards ☆ Screen display prompts whether the microphone is inserted correctly ☆ Automatic shutdown function saves battery power ☆ Typical battery life is three years ☆ Calibration frequency 1kHz
Technical parameter application standard: IEC 60942: 2003
Calibrated sound pressure level:
GJY4 / CEL-110 / 1: 114.0dB +/- 0.4dB and 94.0dB +/- 0.4dB
GJY4 / CEL-110 / 2: 114.0dB +/- 0.6dB
Calibration frequency: 1kHz +/- 1Hz
Harmonic distortion: less than 1.0%
Battery: 1 9V alkaline battery, PP3, IEC 6F22
Battery life: 3 years Overall dimensions: 71 × 40 × 100mm
Weight: 170 grams, including battery
Hesso barrier also know as rock basket retaining wall, hesco barrier, flood control barrier, etc. which is made of the steel welded mesh and lined with non-woven geotextile , can be filled with sand, earth, cement, stone, then as a defence wall or bunker and widely used in the military to protect safety .
Hesco barrier is a modern gabion primarily used for flood control and military fortifications. It is made of a collapsible wire mesh container and heavy duty fabric liner, and used as a temporary to semi-permanent levee or blast wall against explosions or small-arms.
Hesco Barrier,Hot Dipped Hesco Barrier,Galvanized Hesco Barrier,Welded Hesco Barrier
Hebei Giant Metal Technology Co., Ltd. , https://www.hebeigiantmetal.com