Install Instructions

- Data Brochure

Slab Sensor 073

D 073

05/07

Installation - Slab Sensor 073

Slab Sensor 073

The tekmar Slab Sensor 073 has a PVC

plastic sleeve which is designed for use in

soils or concrete. The 073 is supplied with

40’ (12 m) of 2 conductor cable.

STEP ONE

INSTALLING THE SENSOR

NOTE: Proper placement of this sensor is critical

for correct operation of the control.

This sensor is designed to be embedded in the

slab material. However, it is recommended that

the sensor be installed in a plastic or metal conduit

embedded in the slab. If there is ever a sensor

failure, this allows the sensor to be removed and

replaced. The sensor should be placed 1” (25 mm)

below the slab surface and 1/2 way between the

pipes or electric cables.

STEP TWO

WIRING AND TESTING THE SENSOR

Caution: Do not run sensor wires parallel to telephone or power cables. If the sensor wires

are located in an area with strong sources of electromagnetic interference, shielded cable

or twisted pair should be used or the wires can be run in a grounded metal conduit. The

ground wire should be connected to the common sensor terminal on the control and not

to earth ground.

The Slab Sensor 073 is supplied with 40’ (12 m) of cable. If a longer length is required, 18

AWG wire can be spliced onto the two wires from the sensor. The splices should be properly

soldered and protected in an accessible, waterproof junction box. Follow the sensor testing

instructions given in this brochure and then connect the wires to the control.

Slab Sensor 073 placed 1/2 way between the

pipes or cables inside the conduit

1” (25 mm)

PAGE 1
- Data Brochure Slab Sensor 073 D 073 05/07 Slab Sensor 073 The tekmar Slab Sensor 073 has a PVC plastic sleeve which is designed for use in soils or concrete. The 073 is supplied with 40’ (12 m) of 2 conductor cable. Installation - Slab Sensor 073 STEP ONE INSTALLING THE SENSOR NOTE: Proper placement of this sensor is critical for correct operation of the control. This sensor is designed to be embedded in the slab material.
PAGE 2
© 2007 D 073 - 05/07 2 of 4 -40 -37 -34 -32 -29 -26 -23 -21 -18 -15 -12 -9 336,606 280,279 234,196 196,358 165,180 139,402 118,018 100,221 85,362 72,918 62,465 53,658 Resistance Ω 490,813 405,710 30 35 40 45 50 55 60 65 70 75 80 85 -1 2 4 7 10 13 16 18 21 24 27 29 Temperature °F °C 20 -7 25 -4 34,558 29,996 26,099 22,763 19,900 17,436 15,311 13,474 11,883 10,501 9,299 8,250 Resistance Ω 46,218 39,913 100 105 110 115 120 125 130 135 140 145 150 155 38 41 43 46 49 52 54 57 60 63 66 68 Temperature °
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Technical Data SLAB SENSOR 073 Literature Packaged weight Dimensions Approvals Operating range Sensor D 073 0.08 lb. (320 g), PVC sleeve. 40’ (12 m) jacketed wire 3/16” OD x 1-1/2” (5 OD x 38 mm) CSA C US -60 to 140°F (-50 to 60°C) NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C), ß=3892 Limited Warranty and Product Return Procedure Limited Warranty The liability of tekmar under this warranty is limited.