Resistance Meter

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  • Prostat PRS-812 Resistance Meter
  • Prostat PRS-812 Resistance Meter In Use
  • Prostat PRS-812 Resistance Meter In Use
  • Prostat PRS-812 Resistance Meter In Use
  • Prostat PRS-812 Resistance Meter In Use


Portable, Precision Resistance Measurement from FROM 0.1 TO 9.9 X 1012 ohms.

  • Accurate Wide Range Resistance Measurements: 0.1 Ω to 9.9x1012 Ω with overall nominal accuracy <±5%; Maximum range 1.0x1014 Ω
  • Variable Voltage 0.1 mv to 9.99 V for low resistance measurements
  • Constant Test voltages 10V and 100V for specification measurements to meet international and domestic ESD measurement standards
  • Auto Resistance Range Control
  • Auto Test Voltage Control
  • Automatic Electrification Period adjustment to obtain most accurate measurements
  • 80 Data Point Memory
  • Fast and Flexible

Wide Range. Accurate. Portable.

The PRS-812 is a wide range portable constant voltage resistance instrument designed for dedicated ESD Auditors and professionals. The PRS-812 is a cost effective choice for those ESD professionals who require outstanding accuracy and performance, but do not require data downloading. Like its big brother the PRS-801, the PRS-812 has an outstanding performance combination of measurement speed, wide range and accuracy. Its constant test voltage system is extremely stable and consistent with lab level, bench top instruments.

Measurement Range

The PRS-812's accurate wide range of 0.1 to 9.9x1012 ohms, with capabilities to 1.0x1014 ohms, offers exceptional flexibility in measurement applications. In effect, it is 3 instruments in one because it functions as:

  • A low resistance range instrument for measurements from 0.1 to 1.0x104 ohms. Most competitive instruments do not measure accurately at or below 1.0x103 ohms. Thus, the typical ESD practitioner must carry a DMM for low resistance checks of ground connections. To ensure-field accuracy, the PRS-801CC Calibration Shunt is used to confirm and adjust the accuracy of its 0.1 to 10 ohm resistance range.
  • A wide range audit instrument that meets and exceeds requirements for ANSI/ESD S20.20 and TR53 periodic verification (audit) procedures from 1.0x103 to 1.0x1011 ohms. Measurement guidelines require accurate measurements from one decade below to one decade above the resistance requirements of a facility's ESD program. The PRS-812 easily exceeds this requirement by as much as 2 decades, depending on program requirements.
  • Precision high resistance instrument for Packaging measurements to S541 Standards, for material and product testing, and acceptance verification. Few competitive instruments can measure accurately up to or beyond 1.0x1011 ohms, while the PRS-812 comfortably measures up to 1.0x1012 ohms.

Measurement Flexibility

Connect to virtually any 2-wire fixture or electrode configuration. The PRS-812's simple 0.75" inch terminal spacing provides connectivity to a variety of electrodes and fixtures. Terminal design allows use of mechanically shielded or non-shielded banana plug leads. BNC adapters with 0.75" inch spacing mount directly to the PRS-812 terminals for measurements with wide range probes and fixtures

Measurement Speed: Electrification Period

Along with the PRS-801, the PRS-812 is one of the fastest measurement instruments in today's precision measurement market. Laboratory tests confirm the PRS-812 can measure from 0 to 1.0x1012 ohms in 2.5 seconds. Thus, its specified electrification period (EP) is 8 seconds in accordance with ANSI/ESD STM 11.11 Surface Resistance of Planar Materials. Furthermore, its EP is automatically adjusted to insure a stable measurement is displayed.

Multiple Modes of Operation

The PRS-812 has Automatic, Manual and Auto-Manual operational modes, plus exponential display or standard numeric display in ohms, K-ohms, M-ohms, G-ohms and T-ohms. It's easy to use and read. Measurements are summarized in decades using multiple LED's from <103 to >1012.

Constant Test Voltages

PRS-812 has three Test Voltages ranges that provide stable test references for repeatable measurements. In AUTO mode, the instrument automatically selects the proper test voltage for the resistance being measured.

  • <10 Volts: 0.1 to 9.99x103 ohms. <10V is variable across this range from 0.1 mV to 9.99V
  • 10 Volts - Constant Voltage under Load. Constant at 1.0x104 to 9.99x105 ohms. Target calibration is to within ± 0.01 volt, and always within ±1%.
  • 100 Volts - Constant Voltage under Load. Constant at 1.0x106 to 1.0x1012 ohms. Target calibration is to within ± 0.01 volt, and always within ±0.1%

Measurement Convenience & Calculations

Not only does the PRS-812 make accurate measurements quickly, it stores up to 80 measurement data points in its memory. Press the RECORD/RECALL button to retrieve information and calculate attributes of the stored data. Minimum Recorded Measurements. Maximum Recorded Measurements. Average of all Recorded Measurements. The PRS-812 is a convenient, accurate instrument that meets virtually every measurement requirement in the ESD standards world.

Additional Information

PAC Part Number I339916
MFG Part Number PRS-812
Brand Prostat
Shipping Weight 1.3800
Model / Series PRS-812