Eltek Temperature Sensors

Thermistors - For Ambient Temperatures


Thermistors are ideal for temperatures between -50°C to + 150°C and combine fast response time and accuracy. Long cable lengths can be used.

Type U: 2000 ohms at 25°C (accuracy +/-0.1°C over the range 0 to 70°C)

Thermocouples

 

The most common types are J, K and T. The temperature range for your application decides what type to use. Calibration recommended.

PRTs (Platinum resistance) - Accurate at High Temperatures

 

PRTs are best suited for measuring temperatures down to -100°C and up to +600°C with good long-term stability and accuracy. Eltek products support only PT100 Platinum Resistance Sensors.

Due to the small change in resistance of PRTs, cable resistance can affect the accuracy of the sensor. Three or preferably four wire cables are recommended, and long lengths should be avoided.

Eltek Probe Types

 

For general purpurse. These are Robust, fast response, stainless steel, rounded end probes. Typical applications include water, air, vapours, liquids, cryo containers, cold rooms, powders, fridges, freezers, food...

Items marked with a * are available the most common and have a shorter lead time.

CS*
Length 125mm, dia. 4.8mm
CM*
Length 50mm, dia. 3.2mm
CMS*
Length 125mm, dia. 4.8mm
CT*
Length 50mm, dia. 4.8mm
Exposed Junction Thermocouples

Thermocouple sensor at end of cable (conductors are exposed and welded at tip). Fast response, low cost. See cable information for temperature and length details.

Surface Temperature

 

Sensor mounted on either copper or stainless steel base. Typical applications include radiators, pipes, pumps, motors etc

EU* (copper base) / EUS (st. st. base)
Length 50mm, dia. 4.8mm
Room Temperature

 

Sensor assembly mounted on aluminum bracket. Removeable black plastic globe to allow for the effect of radiant heat. Typical applications include radiant temperature and air temperature measurements.

AG

Globe dia. 36mm

Insertion Probes

 

Stainless steel sheath with a pointed end and choice of handle for easy insertion and withdrawal into solid material. Typical applications include frozen food, soil and ice etc

CMP
length 50mm, dia. 3.2mm (no handle)
Soft Insertion Probe

 

Sensor sealed into smooth round ended flexible translucent PVC tubing which is smoothly fused onto cable. For delicate applications requiring flexible soft insertion.

Note: this product is not a medical device and is not intended for use with humans or animals.

Lead Types

1. Lead length up to 20m can be supplied with thermistor sensors.

2. For platinum resistance types P2 max length is 15m.

Connector types

Code 0

No plug (bare wire tails).

Code 3

 

Thermoplug (colour coded) 2 pin ISO.
T type - Brown
K type - Green
J type - Black
Note: Thermocouple plugs are not included with either Eltek data loggers or GenII GS21/24 or 24H transmitters.

For transmitters

 

Code 5 - Mini plug 2 way with strain relief (3.4mm pin spacing)

Code 6 - Mini plug 4 way with strain relief

Code 7 - Mini plug 8 way with strain relief

For wired loggers

 

Code 8 - Standard plug 3 way with strain relief (5.3mm pin spacing)

Code 9 - Standard plug 4 way with strain relief

Code 10 - Standard plug 5 way with strain relief

Code 11 - Standard plug 7 way with strain relief

Code 12 - Standard plug 8 way with strain relief

Code 13 - Standard plug 10 way with strain relief

Code 4

Tini QG-3 pin

For PT100 Sensors, contact Connected IoT for advice on connector types.

Note: Eltek can terminate probes with other connectors to mate with the Squirrel when ordered together with the data logger.

Spare probes are supplied only terminated with the connector types identified above.

Capacitive Humidity and Temperature Probes

RHT10E & RHT20E

The RHT10E & RHT20E are cost-effective, compact and robust RH and temperature probes for use with Eltek GenII transmitters (the probes are not suitable for other applications).
The sensor is housed in a replaceable protective cap with non-removable stainless steel (grade 316) 100-micron dust filter.
The RHT10E & RHT20E are intended for indoor, non-condensing applications. The RH and temp sensor is removable thereby permitting exchange or calibration.
The lead is non-detachable and can be ordered at a user-specified length from 1m up to 10m.

Specification
 

Dimensions
(probe and protective cap)    Diameter:    12.5mm
Length:    67mm

 

RHT10E:
 

Temperature*    Range    -30 to +65°C
Resolution    0.1°C
Sensor accuracy    ±0.4°C (+10 to +40°C)
±1.0°C (-20 to +70°C)
Relative Humidity (non condensing)*    Range    0-100% non condensing
Resolution    0.1%
Accuracy    ±2% (10 to 90%RH)    ±4% (0 to 100%RH)

 

RHT20E:
 

Temperature*    Range    -30 to +65°C
Resolution    0.1°C
Sensor accuracy    ±0.1°C (+20 to +50°C)
±0.3°C (-20 to +70°C)
Relative Humidity (non condensing)*    Range    0-100% non condensing
Resolution    0.1%
Accuracy    ±1.5% (0 to 80%RH)    ±2% (80 to 100%RH)

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