RFM700 series refractometers are robust, low cost, fully automatic instruments that are ideally suited to the food, sugar and beverage industries but can now be used in many other non food applications where use of a waterbath for temperature control is not required.

RFM-700 Serisi

There are four models to choose from depending on the application requirement and the budget available. The lowest priced instrument is the RFM712, which is especially suited for use in fruit processing plants such as in the wine, tomato and sugar industry, whilst the RFM742 is a 2-decimal place instrument ideal for use in beverage plants.

Based on the optics of the world-leading RFM340 refractometer, the RFM700 series features robust construction, a sapphire prism mounted in an easy clean stainless steel dish and an outer casing that is sealed and shaped to withstand sample spillage and moisture ingress. This together with the external power supply makes the RFM700 ideal for use in a harsh factory environment or busy laboratory. The red LED display is clear and visible in dim or bright lighting and includes scale and temperature compensation indicators. Four graphically represented multiple function keys provide simple user interfacing without the requirement to interpret legend.

Commonly, the RFM700 series refractometers are supplied to operate in the °Brix scale with results temperature compensated to 20°C in accordance with ICUMSA. Additional user scales provide measurement in different formats such as various wine, Refractive Index (RI) & FSII as well as allowing custom scales to be loaded in accordance with product data. Product specific temperature compensation may also be input to the RFM700 series refractometers providing a corrected reading whatever the instrument temperature.

Many entry level bench refractometers that adopt temperature compensation do not allow calibration other than at the zero point with water, running the risk of errors at the top end of the scale. The RFM700 series facilitates Span calibration at any value using a variety of media types, as temperature compensation may be adjusted to suit the product being used. Additionally, the instruments are fitted with AG temperature compensation, allowing the use of AG Fluids without the need to use conversion table.

Sample temperature stability is also important. The RFM700 series allows the input of a delay time that forces the operator to wait for countdown before reading, ensuring reliable results every time.

The instrument can also be connected to a printer or laboratory PC, with results being output in printed or CSV formats.

Measurement Specifications	RFM712	RFM732	RFM742	RFM745¹
Scales °Brix User Defined (2 scales - configurable)	0-50 YES	0-100 YES	0-100 YES	0-100 NO
Resolution (°Brix)	0.1	0.1	0.01	0.01
Accuracy (°Brix)	±0.1	±0.1	±0.04	±0.04
Other Scales	User defined – RI, Oechsle, Probable Alcohol (A.P.), Báume, Babo, Sodium Chloride, HFCS, Butyro, FSII² etc. or custom scales, all loaded by PC software.			Fixed 42% HFCS 55% HFCS 90% HFCS
Automatic Temperature Compensation	ICUMSA, AG, None or User Defined			ICUMSA, AG, None
Reading Time (seconds)	3.2	4.5	4.5	4.5
Working Temperature Range	5-40°C
Temperature Sensor Accuracy	±0.05°C
Temperature Stability Checks	Delay time (programmable)
Interface	RS232
Ambient Humidity Range	< 90% RH
Order Code	29-12	29-32	29-42	29-45
Note 1: HFCS model typically for USA market 2: Conforms to ASTM D 5006

Physical Specifications
Prism	Artificial Sapphire (12mm sample area diameter)
Prism Dish	316 Stainless Steel (85mm diameter)
Interface	RS232
Sample Illumination	Light Emitting Diode (life 100,000hr +) 589nm
Temperature Control	None – Temperature Compensation (ATC)