{"product_id":"delta-epsilon-ge0809cb-combo-probe-gamma-resistivity","title":"Delta Epsilon GE0809CB Combo Probe (Gamma\/Resistivity)","description":"\u003cp\u003eThe Delta Epsilon GE0809CB is a compact combination probe that logs natural gamma radiation, spontaneous potential (SP), 16\" normal resistivity, and single-point resistance simultaneously in a single pass down the borehole — a direct replacement for the older GE9409 probe. It's built for use with Delta Epsilon's battery\/single-conductor logging systems (1A-150, 3A-300, 600DL).\u003c\/p\u003e\u003cp\u003eNatural gamma logging reads the formation's natural radioactivity (concentrated in clay and shale), giving a lithology log that works in both open and cased, wet or dry holes. Resistivity logging measures how well the formation and pore fluid conduct electricity — controlled by porosity, pore-fluid salinity, and clay content — and is used to separate clay\/aquitard zones from sandy aquifer zones and flag fresh- vs. saline-water intervals. Running gamma and resistivity together in one probe gives a faster, depth-matched dataset for correlating lithology against water quality in a single trip down the hole.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSpecs:\u003c\/strong\u003e 44.5 mm (1.75\") diameter × 979 mm (38.5\") length, 4.5 kg (9.9 lb). Gamma 0–100,000 CPS; SP ±2000 mV; 16\" normal resistivity and single-point resistance 0–5000 ohm-m\/ohms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eApplication:\u003c\/strong\u003e Groundwater exploration, aquifer characterization, and geotechnical\/environmental borehole logging. Pairs with our \u003cstrong\u003eLN Adapter (LNA0809)\u003c\/strong\u003e to add a second, deeper-reading 64\" resistivity measurement.\u003c\/p\u003e\u003cp\u003eSee the \u003ca href=\"https:\/\/www.geotechenv.com\/pdf\/geophysical_equipment\/deltaEpsilon_borehole_probes.pdf\"\u003eBorehole Probes spec sheet\u003c\/a\u003e for full details.\u003c\/p\u003e","brand":"Geotech Environmental Equipment, Inc.","offers":[{"title":"Default Title","offer_id":48751121432766,"sku":"52251000","price":11500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/GE0809cb_DE_borehole_probe.jpg?v=1787058273","url":"https:\/\/envirotechonline.com\/products\/delta-epsilon-ge0809cb-combo-probe-gamma-resistivity","provider":"EnviroTech Services","version":"1.0","type":"link"}