The Tube Resistance Thermometers Type TP21 meet, by their design layouts, the requirements for a deadspace-free and hygienic measurement in all kinds of fluid media, like e.g. milk, beer, juice etc. The measurement occurs without a profile modification and without contacting the media by the sensing resistor, taking into account the good response times. Therefore e.g. cleaning procedures by a pig etc. are possible.
The device consists of a pipe body with neck tube in stainless steel. Integrated in the pipe body is a PT100-thermometer. Optionally the measuring insert contains one or two measuring resistors PT100, connected via the terminal block of the housing head in 2-, 3- or 4-wire circuit. The temperature sensors are to be integrated in the pipeline. Different connection versions for varying applications are available.
The screw-in resistance thermometers Type TP 12 with G ½ B – screw-in threads designed with or without transmitter are high-performance, robust and all-purpose devices for general applications without special hygienic requirements.
The temperature sensor is a PT100 Platinum resistor, standardly designed in accuracy class A according EN 60751. Accuracy classes B 1/2, 1/3, 1/10 DIN or class B are available optionally. The measurement inserts consist of replaceable single- or double-PT100 resistors. The application of the measurement inserts has to be adjusted to the needs for temperature, length, flexibility, vibration-proofness and measuring accuracy. E.g. for control processes and on-request devices with tapered tips and extra short half-life-times are available.
Safety and profitability aspects advise constructions with protective tubes in case of a possibly necessary change of the probes, so that replacements can be carried out quickly and comfortably, without decommissioning the plant or draining the tanks. Furthermore the protective tube guarantees the restiveness against mechanical stress and chemical attacks. Also variants of protective tubes to be screwed-in or welded can be designed for a quick response time.
The device consists of a pipe body with neck tube in stainless steel. Integrated in the pipe body is a PT100-thermometer. Optionally the measuring insert contains one or two measuring resistors PT100, connected via the terminal block of the housing head in 2-, 3- or 4-wire circuit. The temperature sensors are to be integrated in the pipeline. Different connection versions for varying applications are available. By means of the special design of the housing head in a reliable stainless steel field housing, the sensors are especially suited for measuring tasks in corrosive and aggressive environmental conditions. Also with applications in a wet and humid environment and under extreme conditions the design in IP65 respectively IP67 guarantees robustness and high dependability
Features:
- deadspace-free temperature measurement
- no contacting with media
- for food and pharmaceutical industries
- entirely in stainless steel
- corrosion resistance by field housing
- custom-designed process connections
- optional with transmitter
Specification:
| Housing | field housing |
| Temperature sensor | PT 100 acc. EN 60751, changeable measurement insert (Standard), insert tube 1.4571 |
| Measurement insert, electrical | 1 x PT 100 in 2-, 3- or 4- wire connection, standard: 1 x 3- wire connection, 2 x PT 100 in 2- or 3-wire connection |
| Electrical connection | M16 x 1,5 – cable gland, MS nickel-plated, |
| Optional: M12 x 1 circular connector, 4-pins | |
| Accuracy | Standard: tolerance class A acc. to EN 60751, |
| Optional: tolerance class B 1/10, 1/5, 1/3, 1/2 DIN | |
| Response time | T50 (measured in water): 6 sec. (dependent on design, d = 6 mm) < 4 sec. with tapered sensor tip on request |
| Measured medium temperature | Tmax at sensor = -20… +200°C |
| Housing material | stainless steel 1.4301 (CrNiSt, standard-field housing) |
| Measuring section – material | stainless steel 1.4571, optional 1.4435 or 1.4404, optional: tube in polished steel |
| Protection class | EN 60529, IP 67 with cable gland, optional with cable connection |
| Pressure admissible | PN = 10 bar |
| CE-conformity | EMC-rules are fulfilled, CE-sign |
| Process Connection | TP21 / TW 59…T108, milk pipe screw joint with threaded double-sided neck, DIN 11851, DN20…DN100, |
| TP21 / TW 59…T141 , Tri-Clamp-connection acc. to ISO 2852 | |
| Other connections on request (please specify nominal width) | |
| Neck tube: 38,5 mm x d = 16 mm (acc. to drawing) | |
| Measuring section length: 120 mm (acc. to drawing) | |
| Accessories | |
| Assembly components | None |
| Options | |
| Electrical connection | ceramic connection socket |
| flexible connecting wires | |
| sheathed cable (shakeproof type) | |
| transmitter TE 42, programmable, 4…20 mA, 2- wire connection (standard) | |
| transmitter TE 41, programmable, galvanically isolated | |
| transmitter TE 52, HART | |
| transmitter TE 82, Profibus PA | |
| Calibration | factory calibrated, calibration certificate (3-point or 5-point), with DKD-standard |
| Certificates | material certificate, acc. to EN 10204 |
Options (to be specified in plain text)
Transmitter (programmable), not galvanically separated TE 4200
Transmitter (programmable) galvanically separated TE 4101
Transmitter (programmable), galvanically separated EX TE 4111 EX
HART transmitter TE 52
Profibus PA transmitter TE 82
Configuration set, incl. adaptor and software for TE 41/42 TZ 41/42
Tapered sensor tip D = 3 mm or 4 mm
Accuracy class 1/3 DIN B (per PT 100)
Accuracy class 1/5 DIN B (per PT 100)
Accuracy class 1/10 DIN B (per PT 100)
Sheathed cable version (vibration-resistant version)
DKD calibration certificate => approved by an accredited DKD laboratory
Exchangeable measuring insert, d = 3 mm
Neck pipe L = 75 mm, d = 12 mm – please state other lengths –
M12 x 1 plug, 4-pin
Download Data Sheet: Tube Resistance Thermometer TP 21
Ref: Hengesbach.com
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