{"id":16079,"date":"2026-09-24T12:40:46","date_gmt":"2026-09-24T10:40:46","guid":{"rendered":"https:\/\/socrate.it\/prodotti\/riken-keiki-sd-1-fixed-gas-detector\/"},"modified":"2026-09-28T09:20:54","modified_gmt":"2026-09-28T07:20:54","slug":"riken-keiki-sd-1-fixed-gas-detector","status":"publish","type":"product","link":"https:\/\/socrate.it\/en\/prodotti\/riken-keiki-sd-1-fixed-gas-detector\/","title":{"rendered":"Riken Keiki SD-1, compact fixed gas detector"},"content":{"rendered":"<div style=\"color:#1E293B;line-height:1.65\">\n<h2 style=\"font-size:22px;font-weight:600;color:#0059C8;line-height:1.3;margin:36px 0 14px;margin-top:0\">Frequently asked questions<\/h2>\n<details style=\"border:1px solid #E2E8F0;border-radius:8px;margin:0 0 10px;padding:0 18px;background:#fff\">\n<summary style=\"cursor:pointer;font-weight:600;color:#0059C8;padding:14px 0\">How much does a Riken Keiki SD-1 detector weigh?<\/summary>\n<p style=\"margin:0 0 14px;margin:0 0 16px\">Models for combustible gases weigh about 2.0 kg, the SD-1EC model for hydrogen sulphide and carbon monoxide about 2.2 kg, the SD-1OX model for oxygen about 2.5 kg. All models are 148 mm wide.<\/p>\n<\/details>\n<details style=\"border:1px solid #E2E8F0;border-radius:8px;margin:0 0 10px;padding:0 18px;background:#fff\">\n<summary style=\"cursor:pointer;font-weight:600;color:#0059C8;padding:14px 0\">Can the SD-1 be used where hydrogen or acetylene is present?<\/summary>\n<p style=\"margin:0 0 14px;margin:0 0 16px\">Yes. Riken Keiki declares the SD-1 series suitable for atmospheres containing hydrogen and acetylene, thanks to the explosion-proof enclosure. Hydrogen and acetylene are the most critical gases for the integrity of a flameproof enclosure, because they ignite with very low energy. The exact protection class varies by model, from T5 to T6.<\/p>\n<\/details>\n<details style=\"border:1px solid #E2E8F0;border-radius:8px;margin:0 0 10px;padding:0 18px;background:#fff\">\n<summary style=\"cursor:pointer;font-weight:600;color:#0059C8;padding:14px 0\">SD-1 or SD-3 series: which is better?<\/summary>\n<p style=\"margin:0 0 14px;margin:0 0 16px\">The SD-1 weighs 2 kg, has IP65 protection and operates between -20 and +60 \u00b0C. The SD-3 weighs from 6 to 7.6 kg, has a stainless steel IP66\/67 housing, operates between -40 and +70 \u00b0C and offers digital outputs in addition to 4-20 mA. The SD-1 covers standard installations, the SD-3 harsh environments and gases outside the list.<\/p>\n<\/details>\n<details style=\"border:1px solid #E2E8F0;border-radius:8px;margin:0 0 10px;padding:0 18px;background:#fff\">\n<summary style=\"cursor:pointer;font-weight:600;color:#0059C8;padding:14px 0\">Does Socrate supply spare parts for the SD-1?<\/summary>\n<p style=\"margin:0 0 14px;margin:0 0 16px\">Yes. Socrate handles <a href=\"https:\/\/socrate.it\/en\/services\/\" style=\"color:#0059C8;font-weight:500\">spare parts<\/a> for the SD-1 series, sensors included, also on Riken Keiki instruments purchased from other suppliers. Service, functional testing, scheduled maintenance and calibration are carried out on instruments supplied directly by Socrate. A spare part request requires the code of the installed model.<\/p>\n<\/details>\n<h2 style=\"font-size:22px;font-weight:600;color:#0059C8;line-height:1.3;margin:36px 0 14px\">See also<\/h2>\n<div style=\"display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin:0 0 20px\">\n<div style=\"background:#ffffff;border:1px solid #E2E8F0;border-radius:12px;overflow:hidden;display:flex;flex-direction:column\">\n<div style=\"height:200px;background:#F8FAFC;display:flex;align-items:center;justify-content:center;padding:16px\"><a href=\"https:\/\/socrate.it\/en\/prodotti\/riken-keiki-sd-3-fixed-gas-detector\/\"><img decoding=\"async\" src=\"https:\/\/socrate.it\/wp-content\/uploads\/2026\/09\/D-3series.webp\" alt=\"Riken Keiki SD-3 series fixed gas detector\" loading=\"lazy\" style=\"max-width:100%;max-height:168px;width:auto;height:auto;display:block\"><\/a><\/div>\n<div style=\"padding:18px 20px 20px\">\n<h3 style=\"font-size:17px;font-weight:600;color:#0059C8;line-height:1.35;margin:0 0 8px;font-size:18px;font-weight:600;color:#0059C8;line-height:1.35;margin:24px 0 10px\"><a href=\"https:\/\/socrate.it\/en\/prodotti\/riken-keiki-sd-3-fixed-gas-detector\/\" style=\"color:#0059C8;text-decoration:none;color:#0059C8;font-weight:500\">Riken Keiki SD-3<\/a><\/h3>\n<p style=\"margin:0 0 12px;font-size:14px;line-height:1.55;color:#1E293B;margin:0 0 14px\">Stainless steel fixed detector for harsh environments, from -40 to +70 \u00b0C.<\/p>\n<p style=\"margin:0;margin:0 0 14px\"><a href=\"https:\/\/socrate.it\/en\/prodotti\/riken-keiki-sd-3-fixed-gas-detector\/\" style=\"color:#0059C8;font-weight:600;font-size:14px;text-decoration:none;color:#0059C8;font-weight:500\">Discover \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<div style=\"background:#ffffff;border:1px solid #E2E8F0;border-radius:12px;overflow:hidden;display:flex;flex-direction:column\">\n<div style=\"height:200px;background:#F8FAFC;display:flex;align-items:center;justify-content:center;padding:16px\"><a href=\"\/en\/produttori\/riken-keiki\/\"><img decoding=\"async\" src=\"https:\/\/socrate.it\/wp-content\/uploads\/2026\/09\/rikenkeiki-logo-768x525.png.webp\" alt=\"Riken Keiki logo\" loading=\"lazy\" style=\"max-width:100%;max-height:168px;width:auto;height:auto;display:block\"><\/a><\/div>\n<div style=\"padding:18px 20px 20px\">\n<h3 style=\"font-size:17px;font-weight:600;color:#0059C8;line-height:1.35;margin:0 0 8px;font-size:18px;font-weight:600;color:#0059C8;line-height:1.35;margin:24px 0 10px\"><a href=\"\/en\/produttori\/riken-keiki\/\" style=\"color:#0059C8;text-decoration:none;color:#0059C8;font-weight:500\">Riken Keiki<\/a><\/h3>\n<p style=\"margin:0 0 12px;font-size:14px;line-height:1.55;color:#1E293B;margin:0 0 14px\">The manufacturer, the series distributed by Socrate and how to choose between SD-1 and SD-3.<\/p>\n<p style=\"margin:0;margin:0 0 14px\"><a href=\"\/en\/produttori\/riken-keiki\/\" style=\"color:#0059C8;font-weight:600;font-size:14px;text-decoration:none;color:#0059C8;font-weight:500\">Discover \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<div style=\"background:#ffffff;border:1px solid #E2E8F0;border-radius:12px;overflow:hidden;display:flex;flex-direction:column\">\n<div style=\"height:200px;background:#F8FAFC;display:flex;align-items:center;justify-content:center;padding:16px\"><a href=\"https:\/\/socrate.it\/en\/fire-gas\/\"><img decoding=\"async\" src=\"https:\/\/socrate.it\/wp-content\/uploads\/2024\/10\/rilevazione_gas.jpg.webp\" alt=\"Gas detection in industrial plants\" loading=\"lazy\" style=\"max-width:100%;max-height:168px;width:auto;height:auto;display:block\"><\/a><\/div>\n<div style=\"padding:18px 20px 20px\">\n<h3 style=\"font-size:17px;font-weight:600;color:#0059C8;line-height:1.35;margin:0 0 8px;font-size:18px;font-weight:600;color:#0059C8;line-height:1.35;margin:24px 0 10px\"><a href=\"https:\/\/socrate.it\/en\/fire-gas\/\" style=\"color:#0059C8;text-decoration:none;color:#0059C8;font-weight:500\">Fire &amp; Gas Business Unit<\/a><\/h3>\n<p style=\"margin:0 0 12px;font-size:14px;line-height:1.55;color:#1E293B;margin:0 0 14px\">Design, supply and integration of gas and flame detection systems.<\/p>\n<p style=\"margin:0;margin:0 0 14px\"><a href=\"https:\/\/socrate.it\/en\/fire-gas\/\" style=\"color:#0059C8;font-weight:600;font-size:14px;text-decoration:none;color:#0059C8;font-weight:500\">Discover \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h2 style=\"font-size:22px;font-weight:600;color:#0059C8;line-height:1.3;margin:36px 0 14px\">Documentation<\/h2>\n<ul style=\"margin:0 0 18px;padding-left:20px;padding:0;margin:0 0 14px\">\n<li style=\"margin:0 0 6px;padding:12px 16px;border:1px solid #E2E8F0;border-radius:8px;margin:0 0 8px;background:#fff\"><span style=\"display:inline-block;background:#0059C8;color:#fff;font-size:12px;font-weight:600;border-radius:80px;padding:2px 10px;margin-right:10px\">PDF<\/span><a href=\"https:\/\/socrate.it\/wp-content\/uploads\/2026\/09\/PC2E-0341-250400_SD-1series.pdf\" target=\"_blank\" rel=\"noopener\" style=\"color:#0059C8;font-weight:500;text-decoration:none\">SD-1 series datasheet in English (PC2E-0341, April 2025)<\/a><\/li>\n<li style=\"margin:0 0 6px;padding:12px 16px;border:1px solid #E2E8F0;border-radius:8px;margin:0 0 8px;background:#fff\"><span style=\"display:inline-block;background:#0059C8;color:#fff;font-size:12px;font-weight:600;border-radius:80px;padding:2px 10px;margin-right:10px\">PDF<\/span><a href=\"https:\/\/socrate.it\/wp-content\/uploads\/2026\/09\/PC2E-0341_SD-1series_IT-20260831_compressed.pdf\" target=\"_blank\" rel=\"noopener\" style=\"color:#0059C8;font-weight:500;text-decoration:none\">SD-1 series datasheet in Italian (PC2E-0341, August 2026)<\/a><\/li>\n<li style=\"margin:0 0 6px;padding:12px 16px;border:1px solid #E2E8F0;border-radius:8px;margin:0 0 8px;background:#fff\"><span style=\"display:inline-block;background:#0059C8;color:#fff;font-size:12px;font-weight:600;border-radius:80px;padding:2px 10px;margin-right:10px\">PDF<\/span><a href=\"https:\/\/socrate.it\/wp-content\/uploads\/2026\/09\/%E6%A9%9F%E8%83%BD%E5%AE%89%E5%85%A8_SD-1RISD-1ECSD-1O-X_RK1310015_C001_R4.4.pdf\" target=\"_blank\" rel=\"noopener\" style=\"color:#0059C8;font-weight:500;text-decoration:none\">Functional safety certificate exida RK 1310015 C001 rev. 4.4<\/a><\/li>\n<\/ul>\n<p style=\"margin:0 0 14px;margin:-6px 0 18px;font-size:13px;color:#475569\">Datasheets are available in English and Italian; certificates are in their original language.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<div style=\"color:#1E293B;line-height:1.65\">\n<p style=\"margin:0 0 14px\">The SD-1 series detects combustible gases, hydrogen sulphide, carbon monoxide and oxygen in hazardous areas. It weighs about 2 kilograms and takes up 148 \u00d7 167 mm on the wall.<\/p>\n<p style=\"margin:0 0 14px\">It is the choice for standard installations, where weight and footprint matter and the gas is among those covered by the six available models. For harsher environments or gases outside the list, the answer is the <a href=\"https:\/\/socrate.it\/en\/prodotti\/riken-keiki-sd-3-fixed-gas-detector\/\" style=\"color:#0059C8;font-weight:500\">SD-3 series<\/a>.<\/p>\n<h3 style=\"font-size:18px;font-weight:600;color:#0059C8;line-height:1.35;margin:24px 0 10px\">At a glance<\/h3>\n<div style=\"margin:0 0 20px;border:1px solid #E2E8F0;border-radius:8px\">\n<table style=\"width:100%;border-collapse:collapse;font-size:14px;line-height:1.5;margin:0;border:0\">\n<tbody>\n<tr>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;font-weight:600;width:34%;color:#0059C8\">Detected gases<\/td>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top\">Combustible, hydrogen sulphide, carbon monoxide, oxygen<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;background:#F8FAFC;font-weight:600;width:34%;color:#0059C8\">Measuring principles<\/td>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;background:#F8FAFC\">Catalytic combustion, new ceramic, non-dispersive infrared, semiconductor, electrochemical, galvanic cell<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;font-weight:600;width:34%;color:#0059C8\">Weight and size<\/td>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top\">From 2.0 to 2.5 kg, 148 mm wide<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;background:#F8FAFC;font-weight:600;width:34%;color:#0059C8\">Protection<\/td>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;background:#F8FAFC\">IP65 equivalent, flameproof enclosure<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;font-weight:600;width:34%;color:#0059C8\">Output<\/td>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top\">3-wire 4-20 mA, power and signal on the same cable; HART 7 on specific versions<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;background:#F8FAFC;font-weight:600;width:34%;color:#0059C8\">Certifications<\/td>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;background:#F8FAFC\">ATEX, IECEx, Japan Ex, MED on specific models, CE marking, SIL2 according to IEC 61508 on SD-1RI, SD-1EC and SD-1OX<\/td>\n<\/tr>\n<tr>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top;font-weight:600;width:34%;color:#0059C8\">Hydrogen and acetylene<\/td>\n<td style=\"padding:9px 12px;border:0;border-bottom:1px solid #E2E8F0;vertical-align:top\">Suitable for atmospheres containing hydrogen and acetylene thanks to the explosion-proof enclosure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n","protected":false},"featured_media":15956,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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