HL4108 RH/T & External Temperature Data Logger Part of the HL4000RHT Series, the HL4108 RH/T data logger is fitted with onboard sensors and optional remote surface temperature probe. Suitable for indoor use only. Instrument temperature measuring range: -20°C to +60°C which is extended to 0°C to +125°C with external probes | Humidity range: 10-90%RH non-condensing
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