General Tools DPHO1380KCERT - NIST Calibration Certificate - pH ORP Conductivity Meter Data Logger provides fast and easy pH measurement. This water quality testing pH conductivity meter's dual LCD display shows pH/C & F or mV/C & F simultaneously. Formerly Mannix Instrument.

General Tools DPM122THCERT- NIST Calibration Certificate Temperature Humidity Panel Monitor is a digital thermometer and hygrometer that has a simultaneous display of temperature & humidity. The Small size of DPM122THCERT Humidity Temperature Panel Meter is ideal for tight spaces. Formerly Mannix Instrument.

General Tools DPT300ECERT- NIST Calibration Certificate Digital Thermometer is a digital Anti-roll Thermometer. It has time-saving instant one-second updates.

General Tools DPT392FCCERT Digital Pocket Thermometer is a Digital Pocket Min to Max Thermometer. This digital probe thermometer is water resistant.

General Tools DSM3200DLCERT - NIST Calibration Certificate - Data Logging Sound Meter resourcefully stores up to 32,000 records. General Tools DSM3200DLCERT Data Logging Sound Meter is a practical noise level meter. Formerly Mannix Instrument.

General Tools DSM325CERT - NIST Calibration Certificate - Digital Sound Meter comes with real time display. This small size sound and noise level meter provides high performance at economic cost. Formerly Mannix Instrument.

General Tools DSM8922CERT - NIST Calibration Certificate - Digital Sound Meter, with its background noise absorber, is a very efficient sound level meter. General Tools DSM8922CERT Digital Sound Meter is able to perform as an optimum noise level meter. Formerly Mannix Instrument.

General Tools DSM8925CERT - NIST Calibration Certificate - Digital Sound Meter's digital display with analog bar graph makes test results clear. General Tools DSM8925CERT Digital Sound Meter is a reliable noise level meter. Formerly Mannix Instrument.

General Tools DSM8928CERT - NIST Calibration Certificate - Digital Sound Meter, a noise level meter, provides a digital display with analog bargraph. General Tools DSM8928CERT Digital Sound Meter has the benefit of a large 3.5 digit LCD display. Formerly Mannix Instrument.

General Tools DST300CERT NIST Calibration Certificate Digital Stem Probe Thermometer is a Digital Surface Probe Thermometer.General Tools DST300CERT Digital Stem Probe Thermometer is easy to use.

General Tools DST570CERT- NIST Calibration Certificate Digital Stem Probe Thermometer is a Digital Surface Probe Thermometer (high range). It features a 1 sec normal temperature sensing time.

General Tools DT160ACCERT - NIST Calibration Certificate Digital Laboratory Thermometer has a temperature alarm function with high and low limits. This digital probe laboratory thermometer has audible and visual alarm set points. Formerly Mannix Instrument.