PHOTOMETER; COLLOQUIALS: NO INFORMATION; TYPE: PORTABLE; WORKING RANGE: LR: 0-250MG, L (AS CACO3), MR: 200-500MG L (AS CACO3), HR: 4, 00-750MG L (AS CACO3); VOLTAGE (V): 1.5V AA BATTERY (X3); CURRENT (A): NO INFORMATION;, FREQUENCY (HZ): NO INFORMATION; TEMPERAT, URA OPERATION: 0 TO 50 ° C (32 TO 122 ° F); PLASTIC MATERIAL; DIMENSIONS: 142.5X102.5X50.5MM;, RESISTANCE: NO INFORMATION; DESIGNATED USE, : NO INFORMATION; STANDARDS AND SPECIFICATIONS: IP67; ADDITIONAL FEATURES: LCD, 128X64 PIXELS B W WITH BACKLIGHT, REGIS, TROAUTOMATIC OF AT LEAST 50 READINGS, RESOLUTION TOTAL HARDNESS: 1MG L, LENGTH OF, FILTER WAVE 466NM, BANDWIDTH FILTER 8N, M, FILTER PRECISION WAVE LENGTH 1.0NM; SUGGESTED BRANDS: HANNAINSTRUMENTS, HI97735C