Agilent 34970A Data Acquisition Switch Unit w/ DMM, CALIBRATED 03/08/23

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Agilent 34970A Data Acquisition Switch Unit w/ DMM, CALIBRATED 03/08/23
-NIST Traceable calibration certificate w/ data report.
-Power cable

Product Overview

The Agilent 34970A Data Acquisition / Data Logger Switch Unit consists of a three-slot mainframe with a built-in 6 1/2 digit digital multimeter. Each channel can be configured independently to measure one of 11 different functions without the added cost or hassles of signal-conditioning accessories. Choose from eight optional plug-in modules to create a compact data logger, full-featured data acquisition system or low-cost switching unit. On-module screw-terminal connections eliminate the need for terminal blocks and a unique relay maintenance feature counts every closure on every switch for easy, predictable relay maintenance. Our most popular module 34901A features a built-in thermocouple reference and 20 two-wire channels.


  • 3-slot mainframe with built-in GPIB and RS232 interfaces
  • 6 1/2-digit (22-bit) internal DMM, scanning up to 250 channels per second (not available with option 001)
  • 8 switch and control plug-in modules to choose from
  • Built-in signal conditioning measures thermocouples, RTDs and thermistors, AC/DC volts and current; resistance; frequency and period
  • 50 k readings of non-volatile memory holds data when power is removed
  • Hi/LO alarm limits on each channel, plus 4 TTL alarm outputs
  • Free BenchLink data logger software to create tests without programming

The Agilent 34970A is easy to use for a-multitude of data logging and monitoring applications, either stand-alone or with a computer. Its-flexible, modular design makes it-scalable from 20 to 120 channels, and lets you add actuator, digital I/O, and analog output channels for simple control. Its small size and ruggedized features make it perfect for portable applications, and its small footprint makes it ideal for cramped benchtop testing. Standard GPIB (IEEE 488) and RS-232 interfaces let you program the instrument if you wish to automate tests.

What’s more, each channel is independently configurable. This means you can configure channel 1 for dcV, channel 2 for a K-type thermocouple, and channels 3 and 13 for a 4-wire RTD measurement, all on the same module, all in a single scan. For custom linear conversions, use the Mx+B scaling function on any channel. You can even display a custom 3-character engineering label like RPM or PSI to identify your measurement units.

Alarms are available on a per-channel basis as well. Enter a high limit, a low limit, or both. The unit compares each reading to its limits and flags any out-of-range measurements. You can assign one of four TTL alarm outputs to any input
channel to trigger external alarm lights, sirens, or send a TTL pulse to your control system, all without a PC connected.

This unit automatically builds-a scan list that includes all configured inputs (even digital inputs from the Agilent 34907A multifunction module) in ascending order by channel number. You can pace scans by setting the unit’s internal timer for automatic scanning at a specific interval, by manually pressing a front-panel button, or by sending a software command or external TTL trigger pulse.

Agilent Modules Selection Guide

Model Description Type Speed (ch/sec) Max Volts Max Amps Bandwidth Thermal Offset Comments
34901A 20 ch Multiplexer 2-wire armature (4-wire selectable) 60 300 V 1A 10 MHz < 3 µV Built-in cold junction reference 2 additional current channels (22 total)
34902A 16 ch Multiplexer 2-wire reed (4-wire selectable) 250 300 V 50 mA 10 MHz < 6 µV Built-in cold junction reference
34903A 20 ch Actuator/GP Switch SPDT/form C 120 300 V 1A 10 MHz < 3 µV
34904A 4 x 8 Matrix 2-wire armature 120 300 V 1A 10 MHz < 3 µV
34905A Dual 4 ch RF Mux 50 Ohms Common Low (unterminated) 60 42 V 0.7 A 2 GHz < 6 µV 1 GHz bandwidth through BNC-to-SMB adapter cable
34906A Dual 4 ch RF Mux 75 Ohms Common Low (unterminated) 60 42 V 0.7 A 2 GHz < 6 µV 1 GHz bandwidth through BNC-to-SMB adapter cable
34907A Multifunction Module Two 8-bit digital I/O ports, 26-bit Event Counter, Two 16-bit Analog outputs 42 V, 42 V, +-12 V 400 mA, 10 mA 100 kHz, DC Open drain, Selectable input threshold, Max 40 mA total output per frame
34908A 40 ch Single-Ended Mux 1-wire armature (common low) 60 300 V 1A 10 MHz < 3 µV Built-in cold junction reference, No four-wire measurements

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