Potentiostat / Galvanostat / ZRA Gamry Reference 620

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The latest addition to the Reference 600 series – the Reference 620 – features 20-bit analogue-to-digital conversion, thereby gaining approximately one decade of additional sensitivity. This makes the system the first choice for demanding applications, such as those in fundamental research.

The Reference 620’s eleven current measurement ranges cover 60 pA – 600 mA at ±12 V at the working electrode. Internal amplification extends this to 13 decades, enabling electrochemical impedance spectroscopy (EIS) between 5 MHz and 10 µHz down to the TΩ range with current resolutions of up to 20 aA per bit, using state-of-the-art microelectronics. The careful selection of electronic components and the design result in low noise and hum specifications (< 2 µV rms).

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Product Description

The Reference 620 Potentiostat / Galvanostat / ZRA is a high performance potentiostat, galvanostat, ZRA that offers considerable operating speed, a very wide current measurement range, low noise / hum, high sensitivity and unrivalled versatility with ease of use and connectivity to a wide range of electrochemical cells.

The Reference 620 can measure by sample impedance and frequency range with less than 1% error. It has rise times of < 250 ns. Potential, current and an additional measurement input can be recorded with a data density of up to 3.3 µs per data point. These impressive analogue and digital characteristics enable, for example, impressive theoretical scan rates of 1200 V/s for cyclic voltammograms with a step height of 4 mV.

In addition, the noise and hum in the Reference 620 is conservatively specified at < 2 µV rms, and can be reduced even further by oversampling (fast sampling and averaging).

The Reference 620 has 11 current measurement ranges from 600 mA to 60 pA, which together with the built-in x10 and x100 gain stages results in 13 decades of current measurement with 600 fA in the lowest measurement range.

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Reference 620

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Specifications

DIMENSIONS (cm) 9 (W) x 19 (H) x 27 (D)

SYSTEM

Working electrode potential (max.) ±12 V

Max. current ±600 mA

Number of current measurement ranges with internal amplification 13 (600 fA – 600 mA)

Input resistance >10¹⁴ Ω

Frequency range for EIS measurements 10 µHz – 5 MHz

Temperature measurement: Type K thermocouple

iR
COMPENSATION

Method: Current Interrupt (CI) up to approx. 20 mV/s

Static pre-compensation (Positive Feedback; PF) for fast scans

EARTHING

Floating ground / earthing via the housing optionally possible