PMK America proudly announces the expansion of the ENVI® environmental probe series with the launch of the ENVI® PUHT model and the upgrade of the original PHT to 500 MHz bandwidth. Both probes are designed for reliable, passive signal acquisition under the most demanding temperature conditions.

Built for Extreme Testing

The ENVI® probes are the world’s first modern passive probes for such extreme ranges:

• PUHT: −55 °C to +200 °C

• PHT: −55 °C to +155 °C

With 500 MHz bandwidth, 400 V / 1250 V peak input range, and 4.5 MΩ impedance, ENVI® probes combine precision with durability, enabling engineers to measure confidently in climate chambers and during thermal cycling.

Key features include:

• Universal BNC connector with automatic read-out (RO) for oscilloscope scaling

• Replaceable spring or rigid tips for maximum flexibility

• Calibration at production (optional calibration certificate available)

ENVI® – Scope of Delivery

Each ENVI® probe ships with a carefully selected accessory set to cover standard applications. Please consult the latest ENVI® probe datasheet for a complete list of included items. Here is a selection:

• 1x ENVI® series probe

• 2x Spring Tip 0.8 mm

• Solid Tip, Ground Blade, and HT-Insulating Cap

• Adapters for BNC, PCB, dual leads, and solder-in pins

• HT-Sprung Hook, ground leads (10 cm and 15 cm), and banana plug adapters (for non-handheld use only)

• Alligator Clip V2A to 4 mm Socket (for non-handheld use only)

• Instruction manual

This robust delivery set ensures engineers can begin testing immediately, with reliable connections under varying setups.

ENVI® – Probe Accessories

The ENVI® probe family is supported by a comprehensive range of accessories, giving engineers the flexibility to adapt their probing setup to virtually any measurement challenge. These accessories are designed and safety-tested for use with ENVI® probes, ensuring signal fidelity and safe operation even under demanding conditions.

Contacting Options (selection)

• Spring and Solid Tips (0.8 mm) – interchangeable probe tips allow users to switch between flexible spring tips for delicate or uneven surfaces, and solid tips for stable, rigid contact.

• HT-Sprung Hook 5.0 – enables easy clipping onto components, providing secure hold even in high-temperature environments.

• HT-IC Clips (M & L) – designed for attaching to IC pins (0.64 mm pitch), ensuring precise, hands-free contact during extended testing.

• Solder-in Contact Pins – ideal for long-duration endurance testing or setups where a stable, semi-permanent connection is needed.

Grounding Options (selection)

• Ground Blades – low-inductance connection for clean signal referencing.

• Ground Leads (10 cm & 15 cm) – flexible options for grounding in various test setups.

• Banana Plug Ground Lead & Alligator Clip (V2A) – enable secure grounding to 4 mm sockets, specifically rated for non-handheld use inside climate chambers.

Adapters & Insulation

• BNC and PCB Adapters (5.0-L) – allow flexible connections to boards or instruments.

• Dual Lead Adapter to 0.8 mm Sockets – for parallel probing or custom test configurations.

• HT-Insulating Cap – improves safety and reliability when probing in condensed or high-humidity conditions.

Positioning Tools

• Footer Positioners – stabilize probes on uneven surfaces, reducing noise and contact instability during long tests.

Please see the latest ENVI® probe datasheet for a complete list of extended probe accessories.

Extreme-Temperature Hands-Free Positioning Solutions

Those items are selected members of PMK's popular 3D-positioner and Skid® product families and have one distinguishing feature in common – their capability of withstanding extreme temperatures.

Fig. 1: Selection of extreme-temperature hands-free positioning solutions

Extreme temperatures warrant extreme safety measures. One of the key challenges in extreme-temperature measurements is making sure your test rig not only survives the climate chamber deployment, but remains steadfast, arrested in place and orientation--without collapsing over your DUT mid-experiment.

To achieve this, PMK provides Extreme-Temperature Hands-Free Positioning Solutions, all rated for −55 °C to +155 °C:

• 130 mm tripod (893-200-13V)

• 200 mm tripod (893-200-20V)

• Universal probe holder (893-090-000)

• SKID-M frame (893-500-010)

Fig. 2: ENVI® at –41 °C

The tripods are built from V2A steel and feature a specially designed, extreme-temperature resistant tightening system for reliable positioning. Using M6 screws, they mount securely onto the Skid platform, allowing you to configure and lock your setup exactly as needed. Once assembled, the complete rig can be placed inside the climate chamber and operated hands-free, without concern for stability. After testing, the rig can be removed in the same configuration, maintaining its orientation and tightness.

Applications Across Industries

ENVI® probes are trusted for:

• Automotive – testing ECUs, inverters, sensors, and BMS under extreme cycles.

• Power Electronics – signal acquisition on modules, gate drivers, and converters during stress tests.

• Research & Education – material studies, sensor development, and high-speed digital analysis.

• Aerospace, Railway & Energy – precision measurement in critical environments where reliability is paramount.

Measure Where It Matters

With the new PUHT, the upgraded PHT, and a complete ecosystem of accessories and hands-free solutions, PMK enables engineers to probe with confidence under the toughest conditions.

PMK. Probing Solutions. Worldwide.