{
  "id": "emitters:electric-blanket",
  "collection": "emitters",
  "slug": "electric-blanket",
  "name": "Electric blanket and heated mattress pad",
  "summary": "A resistive heating element in direct body contact for eight hours: among the highest whole-night ELF magnetic exposures in a home unless the element is low-field wound or switched off before sleep.",
  "status": "verified",
  "lastVerified": "2026-08-12",
  "data": {
    "aliases": [
      "heated blanket",
      "electric underblanket"
    ],
    "category": "elf-magnetic",
    "environment": [
      "home"
    ],
    "bands": [
      {
        "label": "Power frequency",
        "minHz": 50,
        "maxHz": 60
      }
    ],
    "dutyCycle": "Thermostat cycling; the field appears only while the element draws current.",
    "distanceProfile": [
      {
        "meters": 0.02,
        "value": {
          "quantity": "magnetic-flux-density",
          "unit": "mG",
          "value": 5,
          "max": 100,
          "basis": "measured",
          "note": "Range reported for legacy resistive elements at body-contact distance; low-field ('dual-wound') designs measure substantially lower.",
          "sourceIds": [
            "niehs-emf"
          ]
        }
      },
      {
        "meters": 0.3,
        "value": {
          "quantity": "magnetic-flux-density",
          "unit": "mG",
          "value": 0.5,
          "max": 10,
          "basis": "measured",
          "note": "Typical range at 30 cm.",
          "sourceIds": [
            "niehs-emf"
          ]
        }
      }
    ],
    "mitigations": [
      {
        "action": "Pre-heat the bed and unplug the blanket before getting in.",
        "effect": "Removes the exposure entirely while keeping the benefit."
      },
      {
        "action": "Choose a low-field dual-wound element if the blanket must run overnight.",
        "effect": "Counter-wound elements cancel most of the external field."
      }
    ],
    "measureWith": [
      "elf-gaussmeter"
    ],
    "related": [
      "limits:sbm-2024-magnetic-bands"
    ]
  },
  "sources": [
    {
      "id": "niehs-emf",
      "title": "Electric and Magnetic Fields",
      "publisher": "National Institute of Environmental Health Sciences",
      "url": "https://www.niehs.nih.gov/health/topics/agents/emf",
      "kind": "government",
      "retrieved": "2026-08-12"
    }
  ],
  "links": {
    "self": "https://emfbase.com/api/emitters/electric-blanket",
    "html": "https://emfbase.com/emitters/electric-blanket",
    "markdown": "https://emfbase.com/emitters/electric-blanket.md",
    "collection": "https://emfbase.com/api/emitters"
  }
}