Monroe Electronics model 257D Electrostatic Fieldmeter - Portable

  • Manufacturer: Monroe
    Model: 257D
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Manufature: Monroe Electronics
Model: model 257D

Range: ±2 kV/cm; ±20 kV/cm
Sensitivity:1 V/cm and 10 V/cm, respectively
Static Accuracy: Better than 5% of reading
Drift:<30 V/cm/hour, non-cumulative after 30 minutes stabilization, referred to input
Noise:<10 V/cm rms, 0 - 200 Hz referred to input
Response Speed: 250 ms 10% to 90% (typical)
Analog Output: ± 20kV/cm = ± 2.0V output (< 10 ohm impedance)
Batteries: Built-in, rechargeable, gel-type, 12V, 1.2AH, >8 hours with backlight on - charging system on-board, <6 hours recharging time
AC Power Adapter: Power adapter supplied: Input: 100 - 240 VAC/ 47 to 63 Hz/260mA
Dimensions: 26.7 x 16.2 x 6.7 cm
Weight with Batteries: 1.1 kg
Operating Environment: 25ºC, ±10ºC, 0-85% RH non-condensing, unaffected by ionized environment
Probe: 1036F-5, 1.75" dia. x 1.25:H (4.4 x 3.2 cm) 8 oz (0.2 kg) with 10 ft. (3 m) cable
Probe Options: Any of our Model 1036 probes will work with the Model 257D. A full range of probe sensitivities and different case styles are available. Please refer to our Model 1036 literature. Optional cable lengths up to 1000 ft for remote operation are available.
Probe Operating Environment:-30ºC to 100ºC, non-condensing
Accessories Included: Power supply, connecting cable, manual, optional carrying case is available

1036F-5 Standard General Purpose Sensor:
257D/110VAC Modular Power Supply
257D/72 Carry Case

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Electrostatic Fieldmeter - Portable - model 257D



The model 257D is a portable, battery-operated fieldmeter for performing static surveys or for use as a diagnostic tool when troubleshooting problems caused by static buildup.
  • Two switch-selectable measurement ranges (2 kV/cm and 20 kV/cm)
  • Recorder output to pass measurements to auxiliary instruments to display or record the data
  • Intrinsically safe sensors are approved for use in hazardous locations when used with approved IS barriers
  • Remote sensors can be located up to 1000 feet from the monitor
  • Chopper-stabilized measurement technique is drift free, even in ionized environments
  • An AC adaptor is provided to recharge the batteries and to operate the Model 257D during longer-term tests

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