Highprecision Temperature Acquisition Module

Kingmach’s highprecision temperature acquisition module handles thermocouple types K, J, T, E, N, R, S, B, and 3-wire RTDs like PT100. Each channel uses a 24-bit sigma-delta ADC, which means it can resolve temperature changes well below 0.1°C under reasonable conditions. Measured accuracy typically falls within ±0.1°C for thermocouples and ±0.05°C for RTDs after cold junction compensation, provided the wiring follows standard practices. The module communicates over isolated RS-485 with Modbus RTU protocol. This makes integration straightforward with a PLC, data logger, or SCADA node without extra converters. Power comes from a 10–30 V DC supply, and the operating temperature range stretches from -40 to 85°C — wide enough for outdoor enclosures and unheated field shelters. Channel count starts at four, and Kingmach can scale that up to 16 or more on request. Inputs are individually configurable through software, so you’re not stuck mixing sensor types on one card unless you want to. Software filtering and averaging are built in; you can tweak the update rate from a few milliseconds per channel to several seconds to match your noise environment. Besides the standard unit, customization extends to things like high common-mode voltage protection, extended isolation ratings, or special mounting brackets for DIN rail or panel. Kingmach’s global network means you’ll usually find a local distributor who stocks spares and can help with commissioning. After the sale, technical support remains available to assist with troubleshooting, firmware updates, or field recalibration. The documentation is thorough, and they’ll even share example wiring diagrams and Modbus map files for your specific logger or controller if you ask. In the end, the module isn’t the star of a monitoring setup — but it is the piece that keeps raw temperature data honest, channel by channel.