H-B Instrument B60570-2500 Pocket Liquid-In-Glass Non Mercury Thermometer, Non-Toxic Liquid Fill, Total Immersion, 20 to 120 degrees F Ideal for field studies, waste water treatment and any on-the-go applications Contains green EnviroKleen certified liquid against white back glass Total Immersion; Length: 160mm (6.3) Hand inspected in our ISO/IEC 9001:2008, ISO/IEC 14001:2004, ISO/IEC 17025:2005 facility and A2LA Accredited Calibration Lab; Recognized and accepted by the signatory economies of the ILAC/MRA Former HB #20578B