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PMK PHT Series High-Temperature Passive Probes

High-temperature passive oscilloscope probes rated up to 400 V, 350 MHz bandwidth, and 155°C operation—engineered for reliable signal testing inside thermostatic chambers and extreme environments.

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  • Special Features
  • Specification

The PMK PHT Series is a line of passive single-ended probes designed specifically for use in extreme temperature and humidity conditions. Whether you're performing waveform measurements inside a thermostatic chamber or under thermal cycling environments, these probes maintain signal accuracy and electrical insulation.

With an input withstand voltage of 400 Vrms, and transient overvoltage protection up to 1650 V, these probes provide robust protection for both instrument and operator. The wide DC to 350 MHz bandwidth ensures that even high-speed signals are captured with clarity and minimal distortion.

Unlike conventional probes, the PHT Series offers unmatched resilience with operational stability from –55°C to +155°C, and reliable performance in up to 98% relative humidity—making it a preferred solution in automotive, aerospace, and power electronics testing.

Available in multiple attenuation options (from 1:1 to 10,000:1), these probes offer flexibility in matching your signal levels, input impedance needs, and measurement resolution requirements.

  • Wide frequency bandwidth up to 350 MHz

  • Withstands 400 Vrms and 1,650 V transient overvoltage

  • Exceptional thermal resilience: –55°C to +155°C

  • Designed for high humidity: up to 98% RH

  • Available in multiple attenuation ratios from 1:1 to 10,000:1

  • Ideal for thermostatic chamber and environmental test applications

  • Manufactured by PMK, a leader in high-performance probe technology

Parameter Details
Type Passive Single-Ended Probe
Series PMK PHT Series
Bandwidth DC to 350 MHz
Input Withstand Voltage 400 Vrms (No Category), 1650 V (transient)
Attenuation Options 1:1, 2:1, 5:1, 10:1, 20:1, 50:1, 100:1, 250:1, 500:1, 1000:1, 2000:1, 10000:1
Operating Temperature –55°C to +155°C
Humidity Tolerance Up to 98% RH (non-condensing)
Applications Thermostatic chambers, high-temp environments
Manufacturer PMK (Germany)
Length 2 meters
Safety Rating Designed for high-stress thermal environments

 

These probes are engineered for test professionals who demand high precision and reliability in climatic or thermal testing conditions. The PMK PHT Series ensures your measurements remain stable, even when everything else heats up.