Supply of Permeation Diffusion Gas Standard Generator

The Health and Safety Laboratory (HSL) is Britain's leading industrial health and safety facility. HSL supports HSE’s mission to protect people's health and safety by ensuring risks in the changing workplace are properly controlled.

BACKGROUND TO THE PROJECT

For the calibration/validation of air sampling methods, sample devices, sensors and the production of laboratory proficiency test samples, HSL requires the ability to produce stable standard gas atmospheres for a range of inorganic and organic gases.

OBJECTIVES

HSL produces such stable standard gas atmospheres based upon procedures codified in the ISO 6145 series of standards.

SPECIFICATION REQUIRED

The requirements are for:-

o System based on diffusion/permeation process for the generation of gas standards as codified in ISO 6145 part 8 and 10 o Thermostatic oven covering the range of at least 30 to 100 ° C Vendor to supply temperature set point resolution, stability and ranges and details of temperature calibration protocol) o Vertical oven orientation allowing the use of diffusion cells (Vendor to supply internal oven chamber dimensions, flow path construction materials and details/sizes of inlet and outlet gas connectors) o 1 x Mass Flow Controller carrier delivery or other metered flow system (Vendor to supply details of mass flow ranges available and accuracy) o Desirable – Humidity control module to produce a relative humidity range of 20 – 90 % (Vendor to supply details of achievable range, stability and set point resolution) o Desirable – RS-485 communications module for optional remote PC control via HSL software written in Labview, source code to be supplied. o Desirable – Modular system – e.g. extra chambers for multicomponent gas generation, dilution modules for secondary dilution

Installation: Commissioning and Training. Tender to include itemised delivery, installation, and commissioning costs for the HSL Buxton site and provision of on-site training of 3-4 staff in the use of the new system.

Warranty: Customary warranty or extended warranty to be offered. HSL would like to a achieve 24 month warranty period as standard for the instrument.

Other Services: We would also like to look at preventative maintenance and calibration services

Additional information: Contract start date is estimated subject to approval and award.

HSL has applied broad estimates in the lowest and highest value fields in the 'Summary Information' section.