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Ametek (Solartron) 7081 – 8.5-Digit Precision Digital Multimeter

Ametek (Solartron) 7081 – 8.5-Digit Precision Digital Multimeter

Product Description

The Ametek (Solartron) 7081 digital multimeter is a laboratory-grade precision instrument offering 8.5-digit resolution (140 million counts). Ideal for calibration labs, metrology, R&D, and production test systems, it delivers ultra-low noise, exceptional stability, and high-accuracy measurements for DC/AC voltage, resistance, ratio, and more. Equipped with IEEE-488 (GPIB) and RS-232 remote interfaces, it supports automated test systems while providing top-tier performance and reliability.

Key Features

8.5-digit resolution (up to 140 million counts) 

DC voltage accuracy as low as 0.5 ppm + 0.3 ppm full scale 

True 4-wire (Kelvin) resistance measurements

Low-current measurements with very low input leakage 

AC measurement from DC to 1MHz with high sensitivity 

Ratio measurements (linear and logarithmic/dB) with high precision

Memory to store up to 500 readings, with real-time clock for timestamping 

Digital filtering (average, window average, continuous) 

Interface: IEEE-488 and RS-232 for remote control and data logging

Long-term stability and low drift for metrology applications 

High-voltage range with specialized probe support (e.g., up to 20 kV)

Technical Specifications

Specification Details
Model Ametek / Solartron 7081
Type Precision Digital Multimeter (Bench)
Resolution 8.5 digits (140 million counts) 
Functions DC Voltage, AC Voltage, Resistance (4-wire), Ratio, Current (via ratio) 
DC Voltage Accuracy ~0.5 ppm + 0.3 ppm full scale
AC Frequency Range DC to 1 MHz (true AC measurement) 
Resistance Range Up to >1.4 GΩ, 4-wire 
Ratio Measurement Yes, linear & dB 
Interfaces IEEE-488 (GPIB), RS-232
Memory Stores up to 500 full-format readings or 1500 compressed 
Filter Options Continuous average, simple average, walking-window average 
Power ~100-240V AC (per manual) 
Drift / Stability Very low drift; designed for calibration labs 
Weight Approx 8.2 kg (18 lbs) per spec sheet


The Ametek/Solartron 7081 8.5-digit precision multimeter is a high-accuracy bench meter, ideal for calibration labs and metrology work, featuring ultra-low noise, 140 million count resolution, and remote interface via GPIB & RS-232. The Ametek Solartron 7081 is engineered for the highest precision measurement needs in laboratories and calibration centers. With 8.5-digit resolution, it offers unmatched sensitivity and stability for critical applications. Whether measuring ultra-low DC voltages, very high resistance using 4-wire techniques, or performing ratio measurements, the 7081 delivers consistent, high-fidelity results. Its advanced filtering, archival memory, and remote control via IEEE-488 and RS-232 make it an ideal choice for automated test systems. Truly designed to be a metrology-grade standard, it reduces measurement uncertainty while enhancing workflow efficiency. Ametek / Solartron 7081 8.5-Digit Precision Digital Multimeter – High-Accuracy Laboratory Bench Meter for DC/AC Voltage, Resistance, and Ratio Calibration.

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