Widest RI range
Highest accuracy (±0.00002RI)
All RFM900s conform to ASTM D 1218, 1747, 2140 & 5006
The RFM900 series of refractometers combine the latest opto-electronic principles with durability and ease of use. RFM900 refractometers feature RFID (Radio Frequency Identification) that allows users to identify themselves by simply swiping a tag across the top of the instrument to enable measurement and, in certain cases, access to the configuration menu.
A low-profile sample dish and non-contact presser makes sample application and cleaning easy. Readings can be taken automatically on the replacement of the presser, and over 700 stored results can be easily viewed in tabular form on the instrument display. Peltier temperature control and intelligent temperature management ensures readings are only taken when the sample and refractometer temperatures are both stable.
The instruments conform to a number of industry measurement standards and offer operational features that
allow use in an environment controlled by FDA regulation 21 CFR Part 11.
The use of a Kalrez gasket and sapphire prism facilitates placement in the harshest measurement environments including those in the pharmaceutical, petrochemical, aroma, flavour, fragrance and other high RI sectors.
The RFM990-Flow model facilitates automation by way of an optionally supplied flowcell attachment.
22-60 - RFM960
22-70 - RFM970
22-90 - RFM990-Flow
22-71 - RFM990-AUS32
The RFM990-AUS32 is an extremely high accuracy refractometer specifically designed to meet the stringent needs of the chemical manufacturing industry. Of particular interest is its compliance with the strictest of ISO procedures in relation to the manufacture of urea-based NOx reduction agents used as Diesel Exhaust Fluids, also known as DEF, AUS32 and Adblue.
ISO22241 dictates the highest level of measurement must be achieved under the tightest limits of temperature control. In addition to the compliance with this norm, the RFM990-AUS32 is fitted with specific Urea scales and temperature compensation as well as an AUS32 Method that allows input of both the F factor and biuret content of the solution that is included in the analysis.
Being part of the RFM900 series of refractometers, users of the RFM990-AUS32 also benefit from common features such as RFID user identity/clearance, on-board data storage, limit checking and audit trails.
No matter how good the instrument performance, without good verification it is not possible to confirm the instrument meets the specification laid down in ISO22241. Bellingham + Stanley offer a UKAS Certified Reference Material for this purpose at the equivalent RI value of Urea stated in the norm.