Digi-Stem® DSX500 Series RTD Thermometer with 4-20 mA Transmitter

Digi-Stem Meters & Probes are sold separately and paired together to create a complete custom system. This listing is for the meter only.  

Please review our Order Guide and choose the meter power source, mounting, and other specifications needed to build a meter.


Digi-Stem Meters and Probes are sold separately to make a completely customizable system. The DSX500 series versions of our popular Wahl Digi-Stem® Digital Thermometers feature 4-20 mA transmitter output with RTD sensor probes.  Our RTD models have a wide temperature range and high accuracy design for applications that require accurate and reliable temperature monitoring.

Our Digi-Stems® are known for their reliability and rugged cases.  The housing is stainless steel with a NEMA-4X rating.  Dimensions are 5.3 inches wide x 4.3 inches high x 2.7 inches deep (13.5cm wide x 10.9 high x 6.9 cm deep).  The large 1 inch high LCD display is readable from 30 feet away.

The DSX500 4-20 mA transmitter is factory configurable to your specification, or user configurable with the optional DSTCAL software kit.

Choose from rigid, remote, or adjustable angle RTD probes built to order to customer specification and sold separately.  The DSX500 Series features programmable “R0” for “matching” the sensor to meter.

Polycarbonate H frame is standard; choose optional stainless steel for additional protection against RF interference and moisture intrusion.

DSX500 series models are powered by 10-36 VDC loop power.  Input power and transmitter output for the DSX500 is via 1/2 inch NPT female conduit port on side of case, and via waterproof 4-pin Turck® connector in side mount conduit connector on the DSX501.

Specify temperature set points and burnout setting (high or low) when ordering.

The DSX500 is USDA Accepted Equipment for NSF/ANSI/3-A-14159-1-2019 (Hygiene Requirements for the Design of Meat and Poultry Processing Equipment.


H Frame Material

DSX500: Polycarbonate, DSX501: Polycarbonate, DSX540: Stainless Steel

Temperature Range

-328° to 1472°F (-200° to 800°C)


°F and °C, switchable

Meter Accuracy

± 0.1°F/C, over 1-year period (@ Tamb = 23°C ± 5°C)

Meter & Probe Accuracy

Temperature ≤ 300°F (148.8°C) = ± 0.3°F (± 0.2°C).
Temperature > 300°F (148.8°C) = ± 0.25% of reading.


1.0” 4-digit LCD display with icons for °F & °C.

Display Resolution

< 1000 = 0.1°; > 1000 = 1°

Sample/Display Rate

2 Seconds standard, adjustable in .25 Second intervals to .25 to 10 seconds with software

Ambient Operating Temperature

-40° to 158°F (-40° to 70°C)


10 to 100% RH, non-condensing



Ambient Temperature Coefficient (From 23°C ± 5°C)

Maximum of 0.003°/°C over Ambient Operating Temperature Range from 23°C ± 5°C


Loop Powered from customer supplied 10-36VDC.
DSX500: input power via 1/2 inch NPT Female conduit port on side of case.
DSX501: input power via waterproof 4-pin Turck connector in the side mount conduit connector.


Stainless Steel, NEMA 4X rated


5.3 in. W x 4.3 in. H x 2.7 in. D (13.5 cm W x 10.9 H x 6.9 cm D)


2 lbs (1 kg)

CE Approval

DSX500: CE approved with loop power cable installed indoors and less than 30m

4 - 20 mA Output


Output Accuracy

± 0.2°F / 0.1°C

Minimum Output Span

18°F (10°C)

Output Scaling

Factory or user programmable with DST Software Kit

Output Connection

DSX500: 1/2 inch NPT Female conduit port on side of case., DSX501: Waterproof 4-pin Turck connector in the side mount conduit connector.

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