geologic software for mapping isoclines and section. Technical specifications Measurement range: 20000nT~100000nT Measurement precision: 1nT Resolving power：0.1T Allowed gradient: 5000Nt /m Data stored: 100,000, out-power protection LCD screen: 240x128 Keyboard: 22 keys Interface：RS-232C standard serial port power: outside rechargeable batteries, 12V/2.3Ah, also power outside Bulk of mainframe: 230mmx155mmx65mm Weight of mainframe: 2.5kg(include batteries) Bulk of sonde: Ψ75mmx155mm Weight of sonde: 0.8kg Working temperature: -10℃~+50℃ Standard Configuration mainframe 1 sonde 1 pole for measurement 1 charger 1 rechargeable batteries 2 gallus 1 adhesive tape 1 wrench 1 line connecting sonde 1 sonde clamp 1 suitcase 1 commmunicate cable 1 USB-serial port cable 1 no magnetic screwdriver 1 software and operation handbook 1 standby bolt for cap of sonde (M4x16) 3 standby bolt for sonde clamp cable (M3x12) 2 standby bolt for sonde line (M4x7) 3 standby bolt (M2x6) 6