OI Analytical 4551A Purge-and-Trap Water Autosampler

The M4551A Purge-and-Trap Water Autosampler achieves results by automating VOC analysis of up to 51 samples. Vertical docking of the autosampler to the Eclipse 4660 Sample Concentrator means no extra benchspace is used. The removable, lightweight sample carousel makes sample loading and unloading easy, while its spiral design optimizes septum-piercing accuracy. With its proven, reliable sample handling system, the Model 4551A gets the job done, sample after sample.

  • Features
  • Specifications
  • Holds up to 51 samples
  • Docks directly onto the Eclipse 4660 Purge-and-Trap Sample Concentrator, minimizing benchspace requirements
  • Program multiple rinses and blanks
  • No system clogging even with lightly particulated water
  • Optional SAM is available for automated standard/surrogate addition
  • Spiral-design carrousel optimizes septum-piercing accuracy
  • Removable, lightweight sample carousel makes sample loading/unloading easy
4551A 46 cm H x 40 cm W x 42.6 cm D
(16.71" H x 15.5" W x 16.75" D)
4551A and Eclipse 81 cm H x 40 cm W x 42.6 cm D
(23.5" H x 15.5" W x 16.75" D)
Depth with Cover 53 cm
Footprint 1677 cm2 (260 in2)
4551A 16.3 kg (36 lb)
4551A and Eclipse 30.8 kg (68 lb)
Sample Loop
5 mL Glass loop (standard)
Valve Six-port electrically actuated,
12 VDC, Valco® Cheminert®
Sample Transfer Pathway
Sampling Needle 7", two-hole, stainless steel
PEEK® Tubing Q/qy" O.D. x .040" I.D. x 17"
Nickel Tubing Q/qy" O.D. x 0.040" I.D. x 26"
Power Requirements
Voltage 100–230 VAC ±10% (autoselecting)
Frequency 50/60 Hz
Gas Requirements
Purity 99.999% (UHP) He or N2
Pressure 50–125 psi
Water Supply Clean water free of VOCs for rinsing the sample pathway and
running blanks
Sample Transfer
Accuracy Better than ±0.3%
Programmable Parameters Sample start and end position
Sample priority
Number of sample replicates (1–3)
Internal and/or surrogate standard addition from
two independent reservoirs
Washes (rinses) per sample
Blank runs between samples
Loop fill and transfer time
Needle depth (85–100%)

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