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Model 257D by Monroe Electronics / TREK


Electrostatic Fieldmeter, use for Smaller Target Sizes

Monroe 257D

Portable, Battery-Operated Fieldmeter for Performing Static Surveys

Advanced Energy’s Monroe 257D is a portable, battery-operated fieldmeter for performing static surveys or for use as a diagnostic tool when troubleshooting problems caused by static build-up.

  • Ranges: ±2 kV/cm and ±20 kV/cm
  • Sensitivity: 1 V/m and 10 V/m, respectively
  • Static Accuracy: Better than 5% of reading
  • Noise: <10 V/m rms, 0 to 200 Hz referred to input
  • Response Speed: 250 ms 10 to 90% (typical)


Feature 1: Two ranges:  +or- 2kV / cm and +or- 20kV / cm
Feature 2: Remote probe for easy monitoring of hard to reach locations
Feature 3: Battery or line operation – AC power module included

Wherever you need NON-Contact Static Measurement:

  • Monitor charge buildup on webs during lamination, coating, manufacturing and printing
  • Check bonding during bagging, dumping, and transport operations
  • Static surveys in offices, on productions lines, “static-free” workstations
  • Prevention of dendric discharge patterns on photographic and X-ray film
  • Loop control for consistency in electrostatic backing of materials
  • Monitor static levels in textile manufacturing to prevent shocks to personnel, bunching and flying of product
  • Drift-free measurement ionized environments



Size 10.5 x 6.4 x 2.6 inches (26.7 x 16.2 x 6.7 cm)
Weight 2 lbs. 6 oz (1.1kg) with batteries
Power Requirements Built-in, rechargeable, gel-type, 12V, 1.2AH, >8 hours with backlight on, charging system on-board, <6 hours recharging time.  Power adapter supplied for 105 to 130 VAC, 47 – 63 Hz, with optional adapter for 90 to 242 VAC, 47 – 63 Hz.
Meter Range +or- 2kV / cm and +or- 20kV / cm
Display Type: LCD
Output: 1/10,000 of  input, < 10 ohm impedance
Accuracy Better than 5% of reading

Model 257D Electrostatic Fieldmeter  Products  (**Monroe/Trek products do not qualify for flat rate shipping!) 

Description Part Number Unit Price
Model 257D Portable Electrostatic Fieldmeter, Probe NOT included, sold separately MMF0257D $4928.00 ORDER NOW

257D Power Supply/Battery Charger $131.00 ORDER NOW! 

Probes Sold Separately:

MODEL 1036F-5  $2691.00  ORDER NOW! 

The Model 1036F is smaller and lighter for
ease of use in less severe environments.
Both types have built-in provisions for
purging with filtered air or inert gas to prevent
drift and to provide additional safety in
hazardous areas. (Both Model 1036 sensors are
approved by Factory Mutual for use in
hazardous locations. See Specifications for
details.) Gas flow in the smaller Model 1036F is
through the sensitive aperture only. To ensure
thorough purging in the larger Model 1036E, gas
flow is directed across the face of the probe, as