The Klein Tools DTL304 is a four-input digital temperature logger with IP67 waterproof and dust-resistant protection. It supports logging, monitoring, and uploading of temperature data across four thermocouple channels simultaneously. Up to 9,999 readings can be stored in internal memory. MIN, MAX, average, and hold functions enable thorough temperature analysis. Data is transferred to a PC via USB using included software. A magnetic hanger strap enables hands-free use. This product has been discontinued. Backed by Klein Tools' 1-year limited warranty.
Is the DTL304 still available?
No — the DTL304 has been discontinued.
What did the DTL304 do?
The DTL304 was a four-channel thermocouple temperature data logger with IP67 environmental protection — suited for extended multi-zone HVAC temperature profiling, laboratory monitoring, and industrial temperature mapping where four simultaneous logged channels were needed.
What current product comes closest?
No Klein product currently matches the DTL304's four-channel logging capability. Dedicated multi-channel temperature loggers from HVAC instrumentation specialists are the alternative.
# Klein Tools® DTL304 Quad Input Temperature Logger **Model:** `DTL304` **Brand:** Klein Tools **Category:** Multimeter > The Klein Tools DTL304 is a four-input digital temperature logger with IP67 waterproof and dust-resistant protection. It supports logging, monitoring, and uploading of temperature data across four thermocouple channels simultaneously. Up to 9,999 readings can be stored in internal memory. MIN, MAX, average, and hold functions enable thorough temperature analysis. Data is transferred to a PC via USB using included software. A magnetic hanger strap enables hands-free use. This product has been discontinued. Backed by Klein Tools' 1-year limited warranty. ## Specifications | Attribute | Value | |---|---| | Product Type | Temperature Logger | | True Rms | No | | Auto Ranging | No | | Low Impedance Loz | No | | Nist Calibrated | No | | Display Type | LCD | | Ip Rating | IP67 | | Battery Type | 2 x AAA | | Overall Length In | 7.2 | | Assembled Weight Oz | 16 | | Barcode (UPC) | 092644693144 | | Warranty | 1-year limited | ## What's Included - Thermocouples - Magnetic hanger strap - USB power adapter - Batteries Source: https://www.jaspecs.com/klein-tools/multimeter/dtl304-klein-tools-quad-input-temperature-logger/