Technical data

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SOLAR

THERMAL

SOLAR

THERMAL

92|

|93

Temperature

sensors

Steca TA OP1

The TA OP1 overvoltage protection unit is a connection

socket in a splash-proof IP 65 protective case and ser-

ves to protect the collector sensors against local lightning

strikes and externally induced voltage spikes.

A varistor protective diode protects against atmospheric

voltage spikes that can lead to destruction of the collec-

tor sensors. The use of the TA OP1 offers extra general

protection of the collector sensors in any type of solar

thermal system. In addition, the simple operation of the

coil-spring clamps allows rapid and simple installation of

the collector sensors using a sensor extension cable.

Features

Spring-coil clamps allow rapid, easy installation

Splash-proof case with IP 65 protection

Varistors provide secure protection against local lightning

strikes and externally induced voltage spikes



Overvoltage protection OP1

Operation temperature range -25 °C...+70 °C

Protection class IP 65 / DIN 40050

Weight 50 g

Dimensions l x w x h 80 x 80 x 50 mm

Accessories

Steca TA ES1

The TA ES1 irradiation sensor is based on a monocrystal-

line silicon solar cell and allows recording of the current

level of solar irradiation. The silicon solar cell is laminated

into a weatherproof, transparent, UV-resistant plastic lid.

The sensor is connected using high-strength cable glands

and cage clamps. The TA ES1 sensor can be used as a so-

called „irradiation threshold switch“ to switch the solar

circuit pump on and off, based on the current level of so-

lar irradiation. Alternatively, the recording of the level of

solar irradiation can be used for monitoring and analysis

of the solar energy system. The sensor is delivered with

a 3 m long, 2-core, UV-resistant connection cable. The

case has pre-drilled holes for screw mounting and also an

opening for strap mounting.

Features

Installation: Horizontal and sloping

Uncertainty: ±5 % annual mean

Weatherproof, UV-resistant case

Useable as:

Irradiation threshold switch

Visualisation of irradiation intensity



—

Irradiation sensor TA ES1

Dimensions solar cell 4.5 cm²

Dimensions case 70 x 70 x 45 mm²

Max. length of connecting cable

with a cable cross-section of 1.5 mm² 20 m

with a cable cross-section of 2.5 mm² 33 m

Cable length (UV resistant) included in delivery 3 m

Technical data

Steca Pt1000-MWT

Sheathed resistance thermometer

The properties of the Pt1000-MExchanger sheathed re-

sistance thermometer make it suitable for use in all

measurement locations where an application specific in-

stallation length, and trouble free exchange of the units, is

desired. The good heat transfer between the protective pi-

pe and the temperature sensor allows short response times

and high measurement accuracy. The standard measure-

ment unit contains a Pt1000 temperature sensor, accor-

ding to DIN EN 60 751 class B, with a two-core switch.

Features

Adjustable immersion depth using a screwed

clamping ring



Sheathed resistance thermometer Pt1000-MWT

Measuring range -10 °C … +105 °C

Diameter Ø 4.5 mm

DIN IEC 751

PVC-cable 2000 mm

Length 350 mm

Bushing material Stainless steel

Terminal screw connection G 1/4“

Material of

terminal screw connection

Stainless steel

Material of clamping ring Stainless steel

Steca Pt1000

Immersion sensor

Immersion sensors allow temperature recording in liquid

and gaseous media and are designed for installation in

existing or on-site immersion sleeves.

Features

For installation in immersion sleeves

Immersion sensor Pt1000 class B

Measuring range -50 °C ... +180 °C

Diameter Ø 6 mm

DIN IEC 751

Silicon cable 1500 mm

Bushing length 50 mm

Bushing

material

Stainless steel

Steca Pt1000-RAF

Pipe sensor

The Pt1000-RAF is a pipe sensor, with tensioning band

and axial sensor pipe, for temperature recording at ducts

and pipes (e.g. cold and warm water pipes), or at heating

loops.

Features

For fastening to pipes, including pipe clamp

Pipe sensor Pt1000-RAF

Measuring range -50 °C … +180 °C

Diameter Ø 6 mm

DIN IEC 751

Silicon cable 3000 mm

Length x

Diameter Ø

20 mm x Ø 15 mm

Bushing material Aluminium