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Electrical Stability

Electrical Stability Tester (EST)

Fann Instrument Company presenta un nuevo Tester de estabilidad eléctrica para usar con fluidos de perforación a base de aceite. Los ingenieros de lodos dependen de la prueba de estabilidad eléctrica para monitorear la estabilidad de la emulsión de un fluido y la capacidad de humedecimiento del aceite. El nuevo tester es más sencillo de operar y puede utilizarse en el laboratorio o en el campo en cualquier parte del mundo.   

The Model 23E Electrical Stability Tester (EST) conforms to the test procedure described in API Recommended Practice 13B-2. It operates on external power or two nine volt batteries. The Model 23E is calibrated in peak volts which is the maximum voltage that the fluid
experiences between the two electrodes. Peak voltage may be converted to Root Mean Square (RMS) voltage by multiplying the peak voltage by 0.7071.


  • Internal power supply and built in AC power plug allow universal operation
  • Power requirements – 100 to 240 VAC, 50/60 Hz, 10 watts
  • Portable operation on two (2) nine volt batteries
  • Self-calibration for immediate performance checks
  • Large backlit display is easy to read, even in low light
EST Model 23E

Ordering Information

Part Number 102130986   Electrical Stability Tester

Data Sheets/Procedures & Manuals


Output Frequency340 ± 2 Hz
Output wave formSinusoidal, <1% total harmonic distortion
Output voltage range0 to 2025 V ± 25 V peak to ground (1432 Volts RMS)
Breakdown peak output current61 micro-amps
Peak Volts readoutBacklit Digital LCD
Voltage ramp rate150 ± 10 V/second
Power supplyTwo 9-Volt alkaline batteries
100-240 VAC, 50/60 Hz, 10 watts
Battery lifeApproximately 250 tests
Dimensions8.3 X 5.1 X 2.8 in. (21 X 13 X 7.1 cm)
Complete Weight4 lbs (1.8 kg)
Probe and Cable length24 in (61 cm)
Probe Electrode Spacing0.061 in. (0.155 cm)
Operating temperature range.32° to 122°F (0° to 50°C)