data acquisition modules

The modules use 24-bit delta-sigma ADCs that help suppress 50/60 Hz power line interference—a common headache in dam and tunnel monitoring. Each channel has programmable gain amplification so you can run low-output strain gauges next to higher-voltage displacement sensors on the same hardware. Input ranges cover ±20 mV to ±10 V, which means you're not stuck swapping interface boards when the project changes. Compatibility comes first in the field. These modules talk directly to vibrating wire, resistive strain gauge, 4-20 mA, and potentiometer-type instruments. The excitation supply is software-switchable between 2.5 V, 5 V, and 12 V with short-circuit protection—handy when cables get pinched in boreholes. If you're using thermistors or RTDs for temperature compensation, the modules handle that internally; no need for extra wiring or a separate logger. Kingmach modules connect over RS-485 (Modbus RTU protocol) and can chain up to 32 units on a single twisted pair. For long-distance sites, an optional SDI-12 interface board swaps in without changing the housing. We've run these over 1.2 km of buried cable with a terminating resistor and saw data packets stay clean. The housing is anodized aluminum rated for 95% non-condensing humidity—common in underground vaults. Data streams can be pulled into third-party SCADA or cloud platforms. If your field techs use manual readouts, the same modules run with our portable Android app via Bluetooth gateway. Tech support can send you register maps and Modbus sample code rather than making you reverse-engineer a closed system.