Part of our complete crane sensors, Anti-Two Block sensors provide an immediate warning when the hook block or load hook approaches the boom head.

• Designed to Operate with 18 LB Weight (Weight Value Including Chain, Etc.) Battery Powered
• Lifted Weight Triggers Magnetic Switch, Transition Status is Communicated by Wired or Wireless Transmission
• Hermetically Sealed Switch Contacts
• Complimentary Switch Contacts Constantly Monitored for Fault Conditions
• Direct Sequence Spread Spectrum, 2.4GHz, 100mW
• Approved US (FCC), Canada (IC), Europe (ETSI)
• Powered by Two Each Lithium D-Cell

Wireless Anti-Two Block Switch
Designed to operate with 18 LB weight. Lifted weight triggers magnetic switch, transition status is communicated by wireless transmission. Hermetically sealed switch contacts. Complementary switch contacts constantly monitored for fault conditions.
Direct sequence spread spectrum, 2.4GHz, 100mW. Approved US (FCC), Canada (IC), Europe (ETSI). Proprietary McCoy communication protocol.
Housing Material: High performance UL rated polyamide resin with stainless steel Hardware. Requires two Lithium D-Cell batteries . Operating Temperature: -40°C to +65°C. Storage Temperature: -40°C to +85°C.

Hardwired Anti-Two Block Switch
Designed to operate with 18 LB weight. Lifted weight triggers magnetic switch, transition status is communicated by wired connection. Hermetically sealed switch contacts. Complementary switch contacts constantly monitored for fault conditions.
Housing Material: High performance UL rated polyamide resin with stainless steel Hardware. 12 - 24 VDC. Operating Temperature: -40°C to +65°C. Storage Temperature: -40°C to +85°C.

Anti-Two Block Weight
Material: 65-45-12 ductile iron. Powder Coat Color: Safety Yellow, PN: PY58-C0007 (Sherwin Williams). Nominal Weight: 13 Lbs.
Chain Material: 316L stainless steel. Trade Size: 3/16". WLL: 930 LBS. BL: 3,720. Weight: 0.32 LB/FT
Shackles Material: 316-NM stainless steel. Trade Size: 1/4". WLL: 1,000 Lbs. Overall Weight: 18 Lbs