Digital Thermostat ( model SDH-2 and SDH-3RT )

120Vac, 208-240Vac or 12/24Vac/dc, 50/60Hz ( specify model )

0 to 255F (or -17 to 140C) standard or depending upon temp. probe ordered
(lower or high temperature ranges available upon request )

+/- 1F (0.5C) Celsius or Fahrenheit (selectable)
ON/OFF or Proportional ( custom control models )
3 digits, 7 segment, Super Bright LED RED GREEN or BLUE
( select Large ( 0.56" ) or Smaller ( 0.36" ) LED display digits )

SPST relay, 30 Amp, 250Vac (or custom)

OPTIONAL, piezo, 85dB internal
Up to 500 feet ( 150m ) away from controller ( any type wire )
Automatic with error display and protection

Specifications:

Supply:

Temp. control range:

Temp. Accuracy/units:
Control mode:
Display:

Load output:

Alarm buzzer:
Probe wiring:
Error detection:

series SDH-2 and SDH-3RT DIGITAL THERMOSTAT
with external temperature sensor.
Output load up to 30 Amp / 250Vac

with ROTARY control :

1. TEMPERATURE PRESET and "OFF" position

APPLICATIONS:

SAUNA control
STEAM BATH control
SPA control
HEATERS and CHILLERS
Heating or Cooling
Other media Temperature
Heat /Cool process control

LED DISPLAY
AVAILABLE
IN ALL COLORS

Face color AVAILABLE
in Grey, Black or Small Grey

DESCRIPTION:
Electronic, digital thermostat designed for Heating or Cooling.
This thermnostat can be preset by rotating the knob on the face. When activated it will control the output high power relay
( on board ) that, when wired to a heater or another load, will control the temperature.
The 3-digit LED display shows both, the preset and the current temperature.
Models available for 120Vac, 208-240Vac, 12V or 24V AC/DC, 50/60Hz.

Other Features:
The load output may be manually turned OFF and the temperature preset may be changed at any time.
The probe may be wired up to 500 ft. ( 150 meters ) away from the controller with standard 2-conductor wire.
Models available to operate in Celsius or Fahrenheit.

DIMENSIONS:

Face: Stainless Steel or
Metal, flush or semi-flush with Lexan decal.
Body: ( W x H x D )
1-3/4" x 2.75" x 2.5"
45mm x 70mm x 64mm

INSTALLATION example in Box :
( SDH-2 shown )

Designed to fit in a 1-Gang
electrical box or in a panel.
Face plate will sit flush with the wall.

Click here to download:
WIRING and INSTRUCTIONS
INSTALLATION
SDH-2 & SDH-3RT SPECIFICATIONS

Typical contents of a standard
SDH-2 controller set
( with Black or Grey label )

OPTIONAL Plastic or Metal (SS)
Sensor Probe Plate
(model PPP4 and PPS4 ).

OPTIONAL:
Sensor Probe Guard only
model PG5 (black or grey ) .

TYPICAL WIRING EXAMPLES

Ordering Example:

SDH-3RT-HP-120-56-FN0P255-RFP100P194-R056BLK

Digital Thermostat with rotary control. Super Red 0.56" digits.
Operating range: 0 to 255 F. Preset Range : 100-194 F.
1 High Power relay (30 Amp max). 120V power line supply.

SELECTION of standard Temperature Probes :

INSTALLATION EXAMPLES