Nessi – The Versatile Liquid Sampler

Mechatest’s (Netherlands) NeSSI Liquid Sampler is designed to take liquid samples, manual or automatic, directly onto the ANSI/ISA 76.00.02 base compliant sampling system substrate or platform. NeSSI; the New Sampling Sensor Initiatives is the stateof-the-art and next-generation modular sampling system designs for process analytical applications. The miniaturisation helps maintain productivity and quality while achieving drastic reductions in resource and waste generation.

The Mechatest NeSSI sampler features a body with a three port configuration which provides sample inlet, bypass and vent connection. On the bottom you place the Mechatest modular “needle sampler”. On the top you can place any valve control device, both connections also based on the ANSI/ISA 76.00.02 – 38.2 mm small footprint.

Control element selection on the ANSI/ISA-76 format is quite varied. Valves (ball, diaphragm, metering, needle, solenoid) are available in different control formats as manual, pneumatic or electronic actuation. Depending on the valve action, the sampler can be used manually or automatically (time or flow based) sampler. The system can be easily designed for unmanned multi-batch collection of representative batches and spot samples of many liquids for laboratory analysis.

The NeSSI Gen I sample conditioning system is a block that is 38.2 mm wide (1.50 in.). It has three sample transfer passages, each with an inside diameter of 2.8 mm (0.110 in.). These passages might seem small but they easily pass 3 l/min of gas or liquids (up to the viscosity of diesel fuel). The instrument’s body comes in standard 316 SS wetted parts, but is also available in more ‘exotic’ materials. This unit offers replaceable needle assemblies for process and vent needles independently to choose in smaller or larger sizes, as well as needles made of small bore full hard temper tube SS316, with very sharp Lancet style pointers,

Replaceable seats for the needles and in a width range of materials are available and a replaceable bottle holder makes the sampler very flexible and offers the possibility to change future bottle volumes.