M.C. Miller 4-Terminal Resistance Meter Model Miller 400D Cat. 44550

Rp. 100
Last Updated
07 Dec 2023
Minimum Order
1 Unit

M.C. Miller 4-Terminal Resistance Meter Model Miller 400D

Item Number: 44550

400D Features

No need to select ranges or adjust dials – the Miller 400D provides a direct read-out of resistance with the push of a button

Bluetooth® interface allows optional data-logging via a Bluetooth-enabled PC (or PDA)**

Rugged, hard plastic case - safe to use on wet ground

Resistance measurement range from 0.01Ω to 10 MΩ (auto-ranging)

High resolution digital display

Resistance measurements are unaffected by any stray interference signals that may be present in the earth during readings, due to the use of narrow band-pass filters centered at 82.2 Hz (the unit's operating frequency)

Runs on a set of replaceable D-Cell Industrial Alkaline Batteries. No need to periodically recharge the unit or to plug it into a power source

Performs 10,000 single readings on a fresh set of batteries

Integrates with Universal Rectifiers' Soil Depth Selector/Multi-Pin Cable Harness System (please see Integration with Universal Rectifiers' Cable Harness)

400D Data-logging Capability:

The Miller 400D Resistance Meter is supplied with an "over-the pipe" soil resistivity survey program, known as ProCP Soil Resistivity, based on the 4-Pin Wenner Methodology.

400D Software Features & Benefits

Errors associated with writing down resistance meter readings and subsequently calculating soil resistivity values based on pin spacings are eliminated using the ProCP Soil Resistivity program in conjunction with the Miller 400D Resistance Meter

M.C.Miller's ProCP Soil Resistivity application can be run on "off-the-shelf" PocketPC hardware (Windows Mobile 5.0 or higher) or on a laptop PC. Hardware must be Bluetooth-enabled


Storage temperature range (with batteries installed): -40°C to 50°C (-40°F to 122°F)

Operating temperature range: -20°C to 54°C (-4°F to 129°F)

Weight: 8.6 pounds (3.9 kg)

Width: 12.0 inches (30.5 cm)

Length: 10.5 inches (26.7 cm)

Height: 5.75 inches (14.6 cm)


0.01Ω to 1MΩ range ±1.6% ±1LS Display Digit ±0.01Ω

1MΩ to 10MΩ range* ±5% ±1LS Display Digit

* For load resistances greater than 1MΩ, in addition to internal meter errors, errors associated with test lead proximity can also be significant (please see Influence of test lead proximity on the accuracy of AC resistance meter readings). When test leads are in close (physical) contact with each other, mutual capacitance and mutual inductance effects can impact the current and voltage, respectively (and hence the resultant resistance value). In such cases, the load (appearing across the input terminals of the meter) is not purely resistive, but, has reactive components as well. The solution to this issue is to make sure that the test leads are physically separated from each other in cases where the soil resistance is greater than 1MΩ.

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