Differencial refractive index detectors for HPLC. They employ a number of improvements for shortening the time for stabilization. By using a micro-processor they are capable of automatic start-up by checking the base-line stabilization. Equipped with color liquid crystal display, the detector allows the chromatographer to easily see operational conditions and base-line trends. By optimizing the method of temperature control, the time for stabilization after the power has been turned on has been shortened and superior base-line stability has been achieved. As the detector is equipped with a leak sensor, the pump can be set to stop automatically in case of solvent leakage. The detectors are possible to use with various chromatographs. They are supplied in three versions: RI-101 (analytical), RI-104 (semi-micro) and RI-102 (preparative).

Specification

Refractive index range	1/4-512 µRIU (RI-101) 2.5-5120 µRIU (RI-102) 1/4-512 µRIU (RI-104)
Flow rate	up to 10 ml/min (RI-101) up to 100 ml/min (RI-102) up to 1 ml/min (RI-104)
Linearity range	600 µRIU (RI-101) 6000 µRIU (RI-102) 600 µRIU (RI-104)
Noise level	2,5 nRIU (RI-101) 2,5 nRIU (RI-102) 5 nRIU (RI-104)
Cell volume	8 µl (RI-101) 8 µl (RI-102) 2,5 µl (RI-104)
Total internal volume	590 µl (RI-101) 700 µl (RI-102) 400 µl (RI-104)
Flow cell pressure	49 kPa
Integrator output	0 to 1 V
Recorder output	0 to 10 mV
Contact output	ready, solvent leak, error (overheating, low light intensity, null glass home position error, lost parameters, optical balance)
Contact input	auto zero, marker, purge on/off
External communication	RS 232C
Response	fast, std, slow
Temperature setting	off, 30 – 50°C (1°C increment), 77°C temp. fuse
Solvent contact parts	stainless steel 316, teflon, quarts glass
Dimensions	60 x 400 x 200 mm (W x D x H)
Weight	approx. 12 kg
Power source	AC 100-240V, 50/60Hz, 150VA