Bench & Gauge

GE Sievers TOC 900 vs SNM-42 Neutron Counter Tube: Repair Project or Tested NOS?

A portable TOC analyzer sold for parts and a tested NOS neutron counter tube are very different detection buys. The comparison focuses on condition, price, and what each product realistically brings to your lab.

Last updated Aug 15, 2026

When you are shopping for spectroscopy, analysis, and detection equipment, the choice here is really between a complete instrument and a detector component. The GE Sievers TOC 900 LAB Portable TOC Analyzer with Power Cable and the SNM-42 Soviet Neutron Counter Tube Detector sit roughly $865 apart in listed price. One is a portable TOC analyzer; the other is a neutron counter tube. That price spread leads to a straightforward question: do you need the analyzer platform or the sensing tube?

Quick verdict

Choose the GE Sievers TOC 900 if your priority is a TOC analyzer platform and you are prepared to work on a unit sold as-is. Choose the SNM-42 if your priority is a lower-cost detector tube that you can build into your own setup. Both are detection equipment, but they answer different questions.

At a glance

ProductListed priceCondition
GE Sievers TOC 900 LAB Portable TOC Analyzer With Power CableUSD 999.99For parts or not working
SNM-42 Soviet Neutron Counter Tube DetectorUSD 135.00New - Open box (tested NOS)

Where each product wins

  • GE Sievers TOC 900 wins for analyzer-level work. It is the TOC analyzer of the pair and comes with its power cable. If your project calls for a TOC 900 LAB analyzer, this is the unit that gives you the make-and-model platform to work with.
  • SNM-42 wins for detector-tube projects and lower-cost builds. With its lower listed price, the SNM-42 is the sharper starting point when you need a neutron counter tube rather than a full instrument.

Product notes

GE Sievers TOC 900 LAB Portable TOC Analyzer With Power Cable

At USD 999.99, the GE Sievers TOC 900 is the higher-priced entry and the full analyzer in this pairing. It is a portable TOC analyzer and includes a power cable, so it fits when your project centers on a TOC 900 LAB unit. The condition is for parts or not working, and the unit was tested to power on before being sold as-is from the pictured physical state. The concrete limitation is that it is not described as a ready-to-run analyzer. Pick it for the analyzer platform itself, and go in expecting to handle repair or parts work.

SNM-42 Soviet Neutron Counter Tube Detector

The SNM-42 Soviet Neutron Counter Tube Detector is the lower-priced side of the pair at USD 135.00, about $865 below the GE. It is offered as tested new old stock in open-box condition, and it is a neutron counter tube detector with a Geiger-counter-type sensing element. The concrete reason to choose it is that low price combined with tested new old stock status: you get a detector component without paying analyzer-level money. The limitation is that a counter tube is not a complete analyzer. You will still need the rest of the detection chain, such as power and readout electronics, before the tube can do useful work.

Final choice by use case

  • Need the TOC analyzer platform? Go with the GE Sievers TOC 900. It is the full analyzer in the comparison and the one to treat as a repair or parts project.
  • Need a neutron detector tube at a lower price? Go with the SNM-42. It gives you a tested new old stock counter tube at the lower listed price.
Products in this article
GE Sievers TOC 900 LAB Portable TOC AnalyzerUSD 999.99View on eBay1pc. NEW SNM-42 Soviet Neutron Counter Tube Detector tested NOSUSD 135.00View on eBay
GE Sievers TOC 900 LAB Portable TOC AnalyzerUSD 999.99View on eBay1pc. NEW SNM-42 Soviet Neutron Counter Tube Detector tested NOSUSD 135.00View on eBay

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