Vacuum sampler for powders and granules

Name: Vacuum sampling
Brand: HECHT
Availability: PreOrder

Sample collection

Description

Vacuum sampling — definition: The HECHT vacuum sampler takes closed, automatic inline samples of powders and granulates from a vertical product column. A vacuum pump draws in the product, a pneumatic swivel actuator opens the closing rod and an integrated ring filter protects the vacuum unit.

Key points

Closing mechanism: patented and flush with the wall; between two samples no mechanical part protrudes into the product flow
Actuation: pneumatic swivel actuator opens the closing rod by up to 180°
Filter: integrated ring filter upstream of the vacuum pump, automatically cleaned by a pressure pulse
Adjustable: via the size of the closing plunger, the degree of opening and the opening time
Design: vacuum-tight and pressure-resistant up to 2.0 bar, without dead spaces
Cleaning: quick to dismantle via Tri-Clamp connections, wet cleaning possible
Application: on mixers, dryers, pressure vessels and agitated vessels, among others; can also be mounted on a ProClean Conveyor (PCC)

The vacuum sampler from HECHT enables the closed, automatic inline sampling of powders and granulates from a product column. The wall-flush sealing mechanism is patented: thanks to its dead space-free design, no mechanical parts protrude into the product flow, nor do hidden angles make thorough cleaning difficult. It is therefore also suitable for products that are difficult to flow and applications that place the highest demands on hygiene and containment.

Explore the complete HECHT product overview or test the vacuum sampler with your own product at our Test & Trial Centre in Pörnbach.

Knowledge base: further reading on vacuum sampling

Powder sampling guide

Author: Joost van Velzen, Managing Director Hecht Technology B.V. Reviewed: 26 October 2026.

Customer benefits

Sampling from mixers, dryers, pressurised containers and stirred containers, among others (as they are almost edge-to-edge)
Sampling can be flexibly adjusted via different sizes of closure plunger, the degree of opening and the opening time
Vacuum-tight and pressure-resistant (up to 2.0 bar)
Product flow free of mechanical parts at all times
Easy to clean
- Quick and easy to dismantle thanks to the Tri-Clamp connections
- Individual parts are easy to clean manually, wet cleaning possible
- Dead space-free design makes cleaning considerably easier

Frequently asked questions about vacuum sampling

How does the HECHT vacuum sampler work?

A vacuum pump creates negative pressure, drawing product from the vertical product column. A pneumatic swivel actuator opens the closing rod by up to 180°. Once the set quantity has been collected in the glass sample bottle, a pressure pulse cleans the ring filter and the closing rod closes again.

Why does no part protrude into the product flow?

The patented closing mechanism closes flush with the wall. Between two samples nothing protrudes into the product flow, and there are no dead spaces or hidden corners where product can remain.

How is the vacuum sampler cleaned?

The sampler can be dismantled quickly via Tri-Clamp connections. The individual parts are easy to clean by hand and wet cleaning is possible; the design without dead spaces makes cleaning easy.

Is the vacuum sampler suitable for poorly flowing products?

Yes. The design without dead spaces makes it suitable for poorly flowing products. A small knocker helps to empty these products completely as well.

Where can I use the vacuum sampler?

On mixers, dryers, pressure vessels and agitated vessels, among others, and mounted on a ProClean Conveyor (PCC). Sampling is adjusted via the size of the closing plunger, the degree of opening and the opening time. Test the right setting with your own product at our Test & Trial Centre.

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Technology

The pneumatic swivelling drive opens the closing plunger with a rotary movement (max. 180°).
The product is sucked out of the upright product column by means of a vacuum. An integrated ring filter prevents product carry-over into the vacuum pump.
Once the set quantity is in the glass bottle, the ring filter is cleaned with a pressure surge and the closure plunger is closed again
Optional:
- Additional (glove) box around the sampling bottle for containment requirements, making it contained to change
- Shut-off device that closes the sampler tightly even without a bottle connected and prevents trickling
- Can be used with sample magazine for up to 24 samples or sample collector with continuous liner

Optional configurations for containment and automation

Vacuum sampling options: You can tailor the HECHT vacuum sampler to your product and your process.

Closing plunger in different sizes, with adjustable degree of opening and opening time for the required sample quantity
Small knocker to fully empty poorly flowing products as well
Sealed product guide tube with flexible sleeve and end seal
Filling into different sample containers
Version for mounting on a ProClean Conveyor (PCC)

Handling substances that require a high containment level? The containment level depends on the toxicity of your substance. We are happy to advise you on the right classification and configuration. Explore the containment portfolio or book a consultation.

Engineering and process advantages

The pneumatic swivelling drive opens the closing plunger with a rotary movement (max. 180°).
The product is sucked out of the upright product column by means of a vacuum. An integrated ring filter prevents product carry-over into the vacuum pump.
Once the set quantity is in the glass bottle, the ring filter is cleaned with a pressure surge and the closure plunger is closed again
Optional:
- Additional (glove) box around the sampling bottle for containment requirements, making it contained to change
- Shut-off device that closes the sampler tightly even without a bottle connected and prevents trickling
- Can be used with sample magazine for up to 24 samples or sample collector with continuous liner

Typical applications

The pneumatic swivelling drive opens the closing plunger with a rotary movement (max. 180°).
The product is sucked out of the upright product column by means of a vacuum. An integrated ring filter prevents product carry-over into the vacuum pump.
Once the set quantity is in the glass bottle, the ring filter is cleaned with a pressure surge and the closure plunger is closed again
Optional:
- Additional (glove) box around the sampling bottle for containment requirements, making it contained to change
- Shut-off device that closes the sampler tightly even without a bottle connected and prevents trickling
- Can be used with sample magazine for up to 24 samples or sample collector with continuous liner

Summary

The pneumatic swivelling drive opens the closing plunger with a rotary movement (max. 180°).
The product is sucked out of the upright product column by means of a vacuum. An integrated ring filter prevents product carry-over into the vacuum pump.
Once the set quantity is in the glass bottle, the ring filter is cleaned with a pressure surge and the closure plunger is closed again
Optional:
- Additional (glove) box around the sampling bottle for containment requirements, making it contained to change
- Shut-off device that closes the sampler tightly even without a bottle connected and prevents trickling
- Can be used with sample magazine for up to 24 samples or sample collector with continuous liner