Specifications

Digi-Stem
®
Thermometers and Transmitters
3
Calibration Services Available
Digi-Stem
®
Introduction
[phone] • FAX [phone] • www.palmerwahl.com
03/07
170 Years of Continued Innovation
Digi-Stem is offered in a variety of configurations to measure process
temperatures remotely located from the meter. Optional remote sensor
cables are available with different stem configurations. Stems can be
specified for a variety of process connections or interfaces, including dif-
ferent thermowell adapters, penetration probes and immersion probes.
See Ordering Guide on pages 5 and 6.
Wahl offers loop-powered transmitter versions of Digi-Stem with contin-
uous, digital, local display. The transmitter is an integral meter and elec-
tronics assembly in NEMA-4X housing with a 4-20mA, 2-wire current
loop. Model DSX300 has a temperature range of 0 to 300°F (-18 to
150°C), while Model DSX310’s range is 200 to 800°F (100 to 425°C). The
transmitters incorporate all Digi-Stem family features, including stainless
steel construction, large digital display, reliability, and rugged construction.
Remote Sensor Systems
RTD or Thermocouple Output
Transmitter Systems
Digi-Stem with Sanitary Stem
Cut-to-Length: Compression seal; for direct immersion in
fluids and for thermowell applications.
Sanitary: Authorized 3-A Sanitary Standard 74-02 for 1.5"
to 3.0" diameter tube sizes with tri-clamp fitting for milk,
food and pharmaceutical processing.
Spring Loaded: Maintains a positive force against the bot-
tom of thermowells; not for direct immersion in fluids;
assembly is not sealed.
Brazed: For use in thermowells.
Welded: Sealed for immersion in fluids; for use in ther-
mowells, sanitary, and high-pressure applications.
Stainless Steel Stems
Cut-to-Length
Sanitary
Spring-Loaded
Brazed or Welded
Stainless Steel Stems
Direct Connection: Wahl provides Digi-Stems with optional dual-element
temperature sensors in the stem for direct connection to recorders and
controllers. The primary sensor drives the local display while the dedi-
cated secondary sensor (RTD or Thermocouple) provides access to a
3- or 4-wire RTD circuit or a Thermocouple system interface. The con-
necting port is 1/2" NPT.
In Situ Calibration: Specify option DSA392M or DSA392HP for in situ
calibration of Digi Stem Model DST200 without removal from a process.
This instrument has an RTD as the secondary sensor, which allows
single-point calibration using Wahl’s highly accurate platinum-RTD Heat
Prober 392 Meter. This provides the accuracy of a laboratory calibration,
and saves time as well as money.