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Forty years. Best in class. Still the only one.
Since 1985, the Genesys Gamma 1 has been setting the single-well gamma counter standard — full assay library, decay-corrected Stored Curves, four decades of Genesys-platform refinement. The kind of engineering nothing else has matched. Still the one labs choose.
7× faster
Beats “automatic” counters 13 min vs. 109 min per panel.
Genesys Genii — parallel-detection runs a 100-tube RIA panel in 13 minutes. Serpentine-belt “automatic” counters take 109. The architecture, not the marketing, makes the difference.
One platform · Three configurations · Made in America since 1985
Four questions about your isotopes, throughput, and priorities. We’ll point you at the right model — and show the time math behind it.
Or scroll down — the page covers what they all share, then breaks out the differences.
Every Genesys counter — the single-well Gamma 1, the multi-well Genii Series, and the high-energy Genii HE — runs the same proven Genesys platform. Same software, same calibration model, same QC engine, same training — engineered in Elburn, Illinois, manufactured in the United States from high-strength materials, with no reliance on outside vendors for the firmware that runs the assay.
Gamma radiation is emitted in all directions, 360 degrees from the sample. Some manufacturers don’t seem to understand that — they minimize crystal mass below the well, which destroys efficiency at higher energies. Genesys detectors don’t do that.
A gamma counter’s sticker price is the smallest part of its lifetime cost. Standards, calibration sources, service contracts, PM windows, and replacement parts add up. The Genesys family is designed to minimize all of them.
The Genesys family is built for the technologist who has actual work to do. Training is measured in minutes, not days. New employees, temporary help, cross-trained staff — running assays the same day.
Most product brochures show a rendered UI mockup. We show you real scanned printouts — the same ESC/P 2 printer output your operators will see, the same column layout, the same MCA spectrum capture, the same pass/fail logic. The Genii, Gamma 1, and Genii HE all share the same firmware family and the same report format.
Every Genesys report carries the date and time stamp from the instrument’s internal clock, the test profile name, the configured count time, and the per-detector breakdown for multi-well configurations. The same format prints from every counter in the family — Genii, Gamma 1, and Genii HE — in DPM, CPM, Bq (decays per second), and nCi as appropriate to the report type.
The header report for an RIA assay run. TEST1, I-125, 1-minute count time, five standards with single-tube replicates, three QC tubes with duplicate replicates, plus the unknown bin. The cubic spline curve fit is selected with %CPM/HI STD as the response variable on linear X & Y. Three QC pools (QC 1 / QC 2 / QC 3) carry their own configured low and high limits, ready to flag any assay run that drifts outside tolerance. Stored Curve is saved automatically; the L-J QC log updates with every run.
The instrument’s record of an isotope’s identity and the per-detector efficiency the firmware has measured for it. Co-57, lot C00202WN, 90–170 keV window, normalized 05/06/02. The half-life is stored in days (271.700) and the firmware decay-corrects the calibrated DPM forward from the normalization date automatically — 228,182 DPM current from an initial 236,807 DPM. Per-well efficiency runs ~82–83% across the five wells with the normalization factor (NF) listed next to each — the basis for AutoSpect’s DPM calculation on every subsequent count.
The chronological QC trend log behind every Levey-Jennings chart. For TEST1, all three QC pools (QC 1, QC 2, QC 3) plotted alongside their configured low / mean / high limits, with the most recent nine records shown here with their deviation values — positive or negative drift from the configured mean for that pool. Drift, bias, and out-of-control conditions surface in seconds, not at the end of the month, and the log auto-prints on demand or scheduled.
The Genesys Genii reading every well of the configuration against the stored efficiency it’s expected to deliver. For Genesys GENII 15020104, Co-57 (lot C00202WN, 228,243 DPM after decay correction), five wells each report CPM, stored efficiency, measured efficiency, and the per-well variance. Anything beyond ±5% variance against the stored efficiency, or beyond 5% overall spread across the configuration, triggers a FAIL annotation in the report. This run: all five wells PASS with the worst variance at −0.622% and an overall spread of just 0.7167%.
One report format, four decades of refinement. The Genesys family produces documentation rich enough for clinical research records, GLP audits, regulatory inspections, and routine QA — out of the box, in the format your operators will print every day. Assay setup, isotope library, QC trend log, system efficiency check — the same printer, the same column layout, the same audit trail across every Genii, Gamma 1, and Genii HE shipped since the platform was first released.
Need a sample report tailored to your tender or procurement evaluation? Contact us — we’ll send fresh printouts directly →
You’ve seen what they share. Here’s where they diverge. Pick by what you count, how many, and how high in energy.
A direct comparison of the LTI Genesys™ Genii against the serpentine-belt Wizard² on a 100-tube RIA assay run — and the architectural decisions behind the time difference.
Serpentine-belt counters — sold by the industry as “automatic gamma counters” — use a vertical lift mechanism that transfers each tube from a sample belt into its detector well, holds it for the count, lifts it back out, and indexes the belt to the next position. The belt is automatic. The workflow it produces is not. The Genii is built differently. The operator slides a rack of ten tubes into the bay, the instrument counts all ten in parallel, the operator slides the next rack in — and as each rack finishes, the operator simply flips it over a waste container and inserts the next. Unloading is integrated into the workflow, not deferred to a separate end-of-assay phase. When the last tube finishes counting on the Genii, the operator is done. When the last tube finishes counting on an “automatic” counter, the operator still has to clear the deck. The math below is what that workflow difference is actually worth — in time, in labor, and over the lifetime of the instrument.
Pre-filled with reasonable defaults for an RIA-style assay schedule. Adjust to match your lab.
Recalculates as you type. The bar chart shows clock time per assay; the tiles show the annual and lifetime impact.
We’ll build a quote around the configuration you’ve modeled above — well count, isotope range, optional accessories, and any RIA-specific options. No sales pressure.
Someone from LTI will be in touch within one business day with a formal quote built around your configuration.
Every line below uses the inputs you entered above and the comparison mode you selected. Change any input or switch modes and these numbers update.
These are estimates based on industry-typical assumptions. Final numbers depend on your isotope, count time, lab schedule, and quoted price. Methodology: A 60-second count time per tube is assumed. Genii cycle = 60 sec count + ~10 sec manual rack swap (10 tubes counted in parallel). Single-detector belt-driven cycle = 60 sec count + ~6 sec sample interchange (1 tube at a time). 10-detector belt-driven cycle = 60 sec count + ~35 sec interchange (10 tubes counted in parallel, but loaded and unloaded sequentially by a vertical lift mechanism along the serpentine sample belt). All time figures are start-to-finish, including rack/tube loading, unloading, and curve editing. Important workflow note: serpentine-belt counters — the instruments marketed as “automatic gamma counters” — require a separate ~4-minute end-of-assay unloading phase (3 min to remove tubes from racks + 1 min to remove racks from the deck) before the next assay can begin. On the Genii, unloading is integrated into the rack-swap cycle — by the time the last tube finishes counting, every previous rack is already dumped and put away. The “operator-finished” time is therefore meaningfully shorter than the “instrument-finished” time on a belt-driven counter, and identical to it on the Genii.
Engineering specs across the family. Cells highlighted where a model diverges from the others; rows that span all three are identical.
| Spec | Gamma 1 | Genii | Genii HE |
|---|---|---|---|
| Detectors | 1 × NaI(Tl) well | 2/3/4/5/6/8/10 × NaI(Tl) wells | 1, 2, or 3 × 2"×2" NaI(Tl) |
| Well dimensions | 1.25" deep × 0.669" diameter — identical across all three | ||
| Photomultiplier tube | Hamamatsu Photonics — every detector, every model. Industry gold-standard PMT. | ||
| Energy range | 0–1000 keV | 0–1000 keV | 0–2000 keV (2 MeV) |
| Efficiency | > 80% I-125, > 80% Co-57 | > 80% I-125, > 80% Co-57 | Optimized 300–800 keV mid-range |
| Lead shielding | 0.75" equivalent | 0.85" | 1.125" |
| E-Lead™ crosstalk correction | — (single well) | Yes — detector-to-detector | Yes — detector-to-detector |
| Curve fits | Point-Point, Straight Line, Weighted Line, Cubic Spline | + 4-Parameter Logistic | + 4-Parameter Logistic |
| Calibration | I-125 / Co-57 / Cs-137 tracer — user-performed, no purchased standards required — same procedure across all three | ||
| QC | Levey-Jennings automatic — identical engine across all three | ||
| Software / stored assays / Stored Curve | Identical Genesys platform — same firmware, same menu structure, same training | ||
| High voltage | Automatic adjustment via calibration routine; high-resolution DAC for stability and energy linearity | ||
| Printer | Epson LX-350 — optional | Epson LX-350 — included | Epson LX-350 — included |
| Connectivity | Dual serial (RS232); optional USB via conversion cable | Dual serial (RS232) + parallel printer port; optional USB via conversion cable | Dual serial (RS232) + parallel printer port; optional USB via conversion cable |
| Power | 100–240 VAC universal, 50/60 Hz, < 30 watts | ||
| Moving parts | None — 100% solid state | ||
| Made in | Elburn, Illinois — United States | ||
Everything below is direct from LTI engineering. If you need something specific that isn’t listed, call us and we’ll send it.
The overall product brochure for the Genesys family — Genii, Gamma 1, and Genii HE. Value proposition, detector design, model comparison, and key tech specs in one document.
Step-by-step training material for new operators — setup, daily QC routine, isotope library, sample counting, reporting, and routine maintenance. Used in lab-floor training today.
For system integrators and LIS developers. RS-232 communication protocol, command set, and data-stream format for connecting the Genesys family to a PC, an LIS, or a custom data-capture utility.
Specs, configuration questions, integration help, evaluation programs, training, or service — one call connects you to the people who designed and built it.
Service direct from LTI Elburn. Field-replaceable parts shipped to your biomed for in-house swap, or send-in repair when the work goes beyond a parts swap. The Genesys instrumentation is small enough to ship UPS — round-trip to the people who built it is often faster than a service-truck visit.
Tell us your isotopes, throughput, and lab constraints. We’ll recommend the right Genesys configuration and a quote — not a sales pitch.