GREYSTONE HAS AN ISO 9001 REGISTERED QUALITY SYSTEM

STRAP-ON HIGH LIMIT THERMOSTAT

THSO SERIES

PRODUCT DESCRIPTION

The single point strap-on high limit thermostat

incorporates a precision thermistor temperature

sensor and provides a Form C relay output (NO/

NC) with an adjustable setpoint. The sensor is

encapsulated in a 38.1 mm x 12.7 mm (1.5” x 0.5”)

machined aluminum heat sink. A 254 mm (10”)

S/S Pipe clamp is provided to secure the assembly

to various sizes of pipe. All probes are constructed

to provide excellent heat transfer, fast response

and are potted to resist moisture penetration. A

hinged and gasketed Polycarbonate enclosure is

included for ease of installation.

TYPICAL INSTALLATION

For complete installation and wiring details,

please refer to the product installation

instructions.

The strap-on temperature transmitter series can

be mounted directly to various sizes of pipes and

secured using a 254 mm (10”) S/S pipe clamp. If

necessary, remove a section of insulation from the

pipe. The 254 mm (10”) S/S pipe clamp is a “Quick

Release” type and can be separated by moving

the tightening screw so that it is perpendicular to

the clamp and slide the clamp apart. Position the

aluminum plate on the pipe so it makes the best

contact, wrap the clamp around the pipe and re-

assemble and tighten. Any excess clamp may be cut

off. For best results, thermal conductive compound

should be applied to pipe prior to mounting the

probe.

Wiring connections are made inside the enclosure.

POWER SUPPLY

12 to 28 Vac/dc

SENSOR ACCURACY

±0.2°C, 0 to 70°C (±0.36°F, 32 to 158°F)

PROBE SENSING RANGE

-40 to 100°C (-40 to 212°F)

PROBE MATERIAL

Machined aluminum heat sink

PROBE DIMENSIONS

38.1mm x 12.7mm (1.5” x 0.5”)

WIRE MATERIAL

PVC insulated, parallel bonded

CONSUMPTION

50 mA max

RELAY CONTACTS

SPDT, Form C contacts (N.O. and N.C.)

5 Amps @ 30 Vdc/250 Vac resistive

1.5 Amps @ 30 Vdc/250 vac inductive

RELAY ACTION

Activates on temperature rise

SETPOINT OPERATION

Single-turn knob-pot on PCB

ADJUSTABLE SETPOINT

Range 1: 38 to 104°C (100 to 220°F)

Range 2: 38 to 60°C (100 to 140°C)

TEMPERATURE DIFFERENTIAL

Low: 1.1°C (2°F) Mid: 2.8°C (5°F) High: 5.6°C (10°F)

Jumper selectable

TEMPERATURE SENSOR

10,000Ω curve matched precision thermistor

OPERATING CONDITIONS

-10 to 50°C (14 to 122°F), 5 to 95 %RH, non-condensing

STORAGE CONDITIONS

-30 to 70°C (-22 to 158°F), 5 to 95 %RH, non-condensing

WIRING CONNECTIONS

Screw terminal block (14 to 22 AWG)

ENCLOSURE

B: Grey polycarbonate UL94-V0, IP65 (NEMA 4X)

F: Same as B with thread adapter (1/2” NPT to M16) and cable gland fitting

COUNTRY OF ORIGIN

Canada

SPECIFICATIONS

CABLE GLAND FITTING

THREAD ADAPTER 1/2” NPT TO M16

ACCESSORIES - INCLUDED WITH F STYLE ENCLOSURE

114.3 mm

4.5"

99.7 mm

3.93"

112.5 mm

4.43"

53.7 mm

2.11"

28.6 mm

1.125"

0.5" NPT

254 mm (10")

S/S Pipe Clamp

Quick Release

Machined

Aluminum