Pune Techtrol Pvt Ltd. Manufactures Bilge Level Switch. Pune Techtrol Pvt Ltd. Is an ISO 9001:2000 certified Company. The Bilge Level Switch is rugged, compact, slosh shielded submersible level switch, used for ship bigeds, industrial sumps, and reservoirs up to 30 meters range. The temperature range is 100 Degree C and pressure is 5 kg/ square cm.