857 controller and glass bottles comdined

Integrated Turn-Key Test System for Redox Flow Cell Research & SOC CellDevelopment


✓ New!!  20A Current Range
✓ New!!  5V Operation for non-aqueous electrolytes
✓ Charge / Discharge Cycling & Performance Characterization
✓ Custom FlowCell™ Software for Complete Process Control & Experimentation
✓ Multi-Range Potentiostat for High Accuracy
✓ Whole and Half-Cell Voltage, EIS and HFR Measurement
✓ Real-Time State-of-Charge Monitoring



  • Integrated system including: cell charge and discharge, electrolyte flow control, temperature control, and data acquisition
  • FlowCell™ software for user-friendly system operation & experimentation
  • High-current, multi-range potentiostat operates in current- or voltage-controlled operation
  • Impedance Analyzer for EIS and HFR measurements during charge, discharge and at OCV
  • High-impedance V-sense inputs for whole and half-cell measurements including EIS & HFR
  • State-of-charge (SOC) voltage inputs for DC SOC measurement when used with SOC cell
  • All non-metallic electrolyte handling system: 2 pumps, electrolyte reservoirs, drain and purge valves
  • Cell and electrolyte temperature control up to 50oC
  • High performance peristaltic pumps with variable flow control including forward and reverse flow
  • Electrolyte shielding with inert gas purge and blanket
  • Single USB communications interface




Options & Accessories:

Vanadium Redox Battery Data using the 857 Flow Cell Test System 857-vandium-redox-non-symmetric-data



Current Ranges (3):   20 A (optional), 7 A, 700 mA, 70 mA full scale (FS)
Current Resolution:    1.4mA (20 A FS) to 4.88 µA (70 mA FS)
Current Accuracy:      ± 1% of full scale current of selected range

Voltage Measurement and Data Acquisition:
Set and Read Voltage vs. WE:  ± 5.000 V
Cell Voltage Sense Leads:   Differential with driven shields
Voltage Measurement Resolution:  152 µV
Sense Lead Input Resistance:  1 GΩ
Data Acquisition Rate:   10 points/second

Impedance Analyzer:
Internal Impedance Analyzer Type: Single sine, one generator and two gain/phase measurement channels
Internal Analyzer Frequency Range:  1 mHz to 10 kHz

Electrolyte Fluid Handling System: Computer-controlled peristaltic pumps (2); <1 to 1,000 mL/min
All non-metallic flow path and reservoirs
Independent drain & purge valves for positive & negative electrolytes
Nitrogen purge and blanket; Electrolyte level monitoring

Temperature Controllers:

Three: cell, anode electrolyte, cathode electrolyte
Set & Report Accuracy:   ±0.25% of span, ±1 least significant digit
Sensor Type:    Thermocouple, Type T

Operating Temperature:   5 to 35 °C
Power Source:     110-120 V, 50-60 Hz, 10 A (Export model 220-240V, 50-60 Hz, 5 A)
Size and Weight:    Electronic Control Unit: 48 W x 13 H x 53 D cm3 (19 x 5.25 x 21 in3); 9 kg (20 lb)
Fluid Control Unit: 50 W x 65 H x 65 D cm3 (20 x 25 x 25 in3); 16 kg (35 lb)

Safety Features:
Automatic shutdown on under- and over-voltage or current, over-temperature, or communications failure
Emergency stop switch for manual operator shutdown

Download the 857 data sheet

Download the latest FlowCell™ software

Download a list of papers explicitly referencing the 857 system  **contact Scribner if you would like a copy of any of these papers**

Download the 857 Flow Rate Calibration Instructions

Download Scribner Redox Flow Cell Data

*Specifications for 25oC ambient temperature unless otherwise noted.

SIGRACELL® is a registered trademark of SGL Carbon SE

Scribner Associates Inc.

Is a leading developer of high-quality instrumentation and software for the electrochemical research and development (R&D) community. Scribner Associates’ hardware and software products are used by academic, private and government laboratories in the areas of fuel cell development and evaluation, battery and redox flow cell technology, corrosion science and engineering, electrochemical sensors and multi-electrode arrays.

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      Southern Pines, North Carolina, USA 28387