Sparling Tigermag Flowmeter Sensor. Model: FM625. S/N: H38854990. Unit requirements: 117 Vac, 50/60 Hz, 11 va. Maximum temperature: 260 °F. Size: 0.5. Offset: 5.15. K-factor: 11606.51 pulses/gal. Maximum torque: 17 ft/lbs. Liner Material: CER. Electrical code: suitable for CL. I Dlv. 1, Groups B,C, & D; CL. II Groups E, F & G Haz. Loc. Max Conduit Length not to exceed 18 inches. The Tigermag flowmeter is an obstructionless device for monitoring the volumetric flow of conductive liquids in full closed pipes. Tigermag Display. Overall dimensions: 10 in. L x 4-1/2 in. W x 14 in H.