{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "tri-clamp-pg13-5-probe-ports",
 "name": "Tri-clamp caps with PG13.5 probe ports (12 mm pH, dissolved O₂ and CO₂ probes): 1½ to 4 in",
 "kind": "hardware",
 "category": "Hardware",
 "group": "Sanitary clamp fittings",
 "year": null,
 "question": "How do I mount a 12 mm pH probe on a tri-clamp?",
 "tags": [
  "ph probe",
  "pg13.5",
  "probe port",
  "dissolved oxygen",
  "sensor port",
  "sanitary",
  "tri-clamp",
  "clamp fitting",
  "brewing",
  "homebrew"
 ],
 "aliases": [
  "tri clamp ph probe port",
  "pg13.5 tri clamp",
  "12mm ph probe mount",
  "fermenter ph probe port",
  "tri clamp sensor port"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 5,
 "url": "https://xemstudio.com/objects/tri-clamp-pg13-5-probe-ports/",
 "sheet_txt": "https://xemstudio.com/objects/tri-clamp-pg13-5-probe-ports/sheet.txt",
 "sheet": {
  "basis": "Xem Studio design on the standard solid cap: PG13.5 (DIN 40430: Ø20.4 major, 1.41 pitch, Ø18.6 core) in a Ø30 boss, drawn as the core bore over 12 mm of thread, Ø12.5 through for the 12 mm probe shaft",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Most process probes (pH, ORP, dissolved oxygen, dissolved CO₂, conductivity) are 12 mm shafts with a PG13.5 thread on the head: they screw straight into this port and seal on their own O-ring.",
   "Probe length sets how deep the tip reaches below the clamp face; pick the probe so its tip sits in the liquid at your lowest fill.",
   "Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40."
  ],
  "table": {
   "columns": [
    "clamp",
    "ports",
    "pg_major_mm",
    "core_mm",
    "probe_mm"
   ],
   "rows": [
    [
     "1–1½",
     1,
     20.4,
     18.6,
     12
    ],
    [
     "2",
     1,
     20.4,
     18.6,
     12
    ],
    [
     "3",
     2,
     20.4,
     18.6,
     12
    ],
    [
     "3",
     3,
     20.4,
     18.6,
     12
    ],
    [
     "4",
     3,
     20.4,
     18.6,
     12
    ]
   ]
  }
 },
 "sheet_text": "Tri-clamp caps with PG13.5 probe ports (12 mm pH, dissolved O₂ and CO₂ probes): 1½ to 4 in — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/tri-clamp-pg13-5-probe-ports/  (CC BY 4.0)\nBasis: Xem Studio design on the standard solid cap: PG13.5 (DIN 40430: Ø20.4 major, 1.41 pitch, Ø18.6 core) in a Ø30 boss, drawn as the core bore over 12 mm of thread, Ø12.5 through for the 12 mm probe shaft\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Most process probes (pH, ORP, dissolved oxygen, dissolved CO₂, conductivity) are 12 mm shafts with a PG13.5 thread on the head: they screw straight into this port and seal on their own O-ring.\n- Probe length sets how deep the tip reaches below the clamp face; pick the probe so its tip sits in the liquid at your lowest fill.\n- Every clamp face is the ISO 2852 profile used across this site: 2.85 mm rim, flat face with the gasket groove (K 1.6 deep, R3 1.2 bottom, 23° walls, P2 0.8 edges) on C2, 20° back cone. Flange C3 / groove C2 / tube OD × wall, mm: ½–¾ in 25.0 / 20.4 (derived) / 12.7–19.05 × 1.65; 1–1½ in 50.5 / 43.5 / 25.4–38.1 × 1.65; 2 in 64.0 / 56.5 / 50.8 × 1.65; 2½ in 77.5 / 70.5 / 63.5 × 1.65; 3 in 91.0 / 83.5 / 76.2 × 1.65; 4 in 119.0 / 110.0 / 101.6 × 2.11; 6 in 166.9 (6.570 in) / 156.5 / 152.4 × 2.77; 8 in 217.7 (8.570 in) / 207.0 / 203.2 × 2.77; 10 in 268.5 / 261.0 / 254.0 × 3.40; 12 in 319.3 / 311.8 / 304.8 × 3.40.\n\nclamp  ports  pg_major_mm  core_mm  probe_mm\n1–1½  1  20.4  18.6  12.0\n2  1  20.4  18.6  12.0\n3  2  20.4  18.6  12.0\n3  3  20.4  18.6  12.0\n4  3  20.4  18.6  12.0\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- DIN: DIN 40430 Pg (Panzergewinde) threads: PG13.5 Ø20.4 major, 1.41 pitch (18 tpi), Ø18.6 core; the thread of 12 mm process probes (pH, dissolved O2 / CO2) — standard — DIN; dimensions are facts [verify license at link] — https://www.din.de/en\n- GW Kent: Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness — web — publisher's guide; dimensions cited — https://www.gwkent.com/triclamp-guide\n- Rubber Fab: Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50) — PDF — maker chart; dimensions are facts [verify license at link] — https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/index.json\nAPI: https://xemstudio.com/api/geometry?object=tri-clamp-pg13-5-probe-ports\n",
 "sources": [
  {
   "publisher": "DIN",
   "title": "DIN 40430 Pg (Panzergewinde) threads: PG13.5 Ø20.4 major, 1.41 pitch (18 tpi), Ø18.6 core; the thread of 12 mm process probes (pH, dissolved O2 / CO2)",
   "url": "https://www.din.de/en",
   "formats": [
    "standard"
   ],
   "license": "DIN; dimensions are facts",
   "license_verified": false,
   "hosted": false
  },
  {
   "publisher": "GW Kent",
   "title": "Tri-clamp fittings guide: tube OD, flange OD and ID per size to 12 in; solid cap thickness",
   "url": "https://www.gwkent.com/triclamp-guide",
   "formats": [
    "web"
   ],
   "license": "publisher's guide; dimensions cited",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rubber Fab",
   "title": "Tri-Clamp gasket dimensional chart: gasket ID, OD and bead diameter per size (2 in bead 2.22 in / 56.50 mm, 1.5 in 1.71 / 43.50, 3 in 3.29 / 83.50)",
   "url": "https://shop.andersonprocess.com/media/assets/product/documents/rubber-fab-tri-clamp-dimensions.pdf",
   "formats": [
    "PDF"
   ],
   "license": "maker chart; dimensions are facts",
   "license_verified": false,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "tri-clamp-brewing-sensor-lids",
  "tri-clamp-probe-gland-caps",
  "tri-clamp-thermowells"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "Which probes fit?",
   "a": "Any 12 mm probe with a PG13.5 head: most industrial pH, ORP, DO and dissolved-CO₂ probes."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "pg13-5-cap-1.5in-x1",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-1.5in-x1.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-1.5in-x1.stl",
   "note": "1–1½ in cap with 1 × PG13.5 probe port: boss Ø30 × 16, core bore Ø18.6 × 12 (thread), Ø12.5 through"
  },
  {
   "file": "pg13-5-cap-2in-x1",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-2in-x1.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-2in-x1.stl",
   "note": "2 in cap with 1 × PG13.5 probe port: boss Ø30 × 16, core bore Ø18.6 × 12 (thread), Ø12.5 through"
  },
  {
   "file": "pg13-5-cap-3in-x2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-3in-x2.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-3in-x2.stl",
   "note": "3 in cap with 2 × PG13.5 probe port: boss Ø30 × 16, core bore Ø18.6 × 12 (thread), Ø12.5 through"
  },
  {
   "file": "pg13-5-cap-3in-x3",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-3in-x3.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-3in-x3.stl",
   "note": "3 in cap with 3 × PG13.5 probe port: boss Ø30 × 16, core bore Ø18.6 × 12 (thread), Ø12.5 through"
  },
  {
   "file": "pg13-5-cap-4in-x3",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-4in-x3.step",
   "stl": "https://xemstudio.com/files/hardware/tri-clamp-pg13-5-probe-ports/pg13-5-cap-4in-x3.stl",
   "note": "4 in cap with 3 × PG13.5 probe port: boss Ø30 × 16, core bore Ø18.6 × 12 (thread), Ø12.5 through"
  }
 ],
 "markdown": "https://xemstudio.com/objects/tri-clamp-pg13-5-probe-ports/index.md"
}