General Tools Instrument DMM120CERT - NIST Calibration Certificate - Digital Multimeter is an auto ranging digital multimeter. General Tools DMM120CERT Digital Multimeter is also a full featured mannix multimeter. Formerly Mannix Instrument.

General Tools Instrument DMM122DLCERT - NIST Calibration Certificate - True RMS Recording Multimeter is an accurate data logger true rms recording multimeter. General Tools DMM122DLCERT True RMS Recording Multimeter is a complete true rms multimeter with a 32,000 record data logger. Formerly Mannix Instrument.

General Tools Instrument DMM30ULCERT - NIST Calibration Certificate - Digital Multimeter measures AC-DC voltage, DC current, resistance, diode test, transistor hFE, micro Amps and millivolts as a complete multimeter. General Tools DMM30ULCERT Digital Multimeter's unique square wave output makes it a valuable General Tools multimeter. Formerly Mannix Instrument.

General Tools DMM333ULCERT - NIST Calibration Certificate - Digital Multimeter is a fully auto ranging digital multimeter. General Tools DMM333ULCERT Digital Multimeter's strength is in its simplicity as a General Tools multimeter. Formerly Mannix Instrument.

General Tools DMM51FSGCERT - NIST Calibration Certificate - Digital Multimeter, a mannix instrument, measures AC-DC voltage, AC-DC current, resistance, capacitance, diode, temp, frequency, continuity. General Tools DMM51FSGCERT Digital Multimeter is a digital multimeter featuring a protective boot with tilt stand. Formerly Mannix Instrument.

General Tools DMM830HSCERT - NIST Calibration Certificate - Economy Digital Multimeter emphasis is on the economy part of economy digital multimeter. General Tools DMM830HSCERT Economy Digital Multimeter features a simple single lead hotside identification with bright red LED. Formerly Mannix Instrument.

General Tools DNGD168CERT - NIST Calibration Certificate - Portable Gas Detector is a small size combustible gas leak detector. General Tools DNGD168CERT Portable Gas Detector detects refrigerant gas leaks with a concise LCD Digital display. Formerly Mannix Instrument.

General Tools DNGD172PCERT - NIST Calibration Certificate - Digital Natural Gas Detector is a gas leak detector. General Tools DNGD172PCERT Digital Natural Gas Detector is an intrinsically safe combustible gas indicator. Formerly Mannix Instrument. Free ground shipping within continental US.

General Tools DOM22CERT - NIST Calibration Certificate - Dissolved Oxygen Meter provides automatic temperature compensation. This dissolved oxygen sensor comes with a Precision Polargraphic Probe for DO. Formerly Mannix Instrument. Discontinued product.

Yellow Jacket 69239 Digi-Alarm Thermometer measures from -58° to 392°F (-50° to 200°C).

General Tools DPH208RCERT - NIST Calibration Certificate - pH Meter offers a wide range of applications including: pools,aquariums, labs, aqua culture, water testing and much more. The water quality testing meter measures pH from 0 to 14.00 pH. Formerly Mannix Instrument.

General Tools DPH8690CERT - NIST Calibration Certificate - Field Calibratable pH Instrument simultaneously displays pH and temp. The field calibratable pH instrument has an automatic calibration at the touch of a button. Formerly Mannix Instrument.