Brand: CEMB

CEMB TR-I Explosion-Proof Absolute Vibration Transmitter

Name: CEMB TR-I Vibration Transmitter ATEX SIL 2 – Datasheet
Brand: CEMB
SKU: TR-I

Description

The CEMB TR-I is a two-wire 4-20 mA transmitter that measures the absolute vibration of a machine support and sends it straight to a PLC, DCS or machinery protection system. It is built in an explosion-proof version for classified areas, with an AISI 316L stainless steel body and a die-cast aluminium terminal housing, and carries ATEX, IECEx and SIL 2 certification. It is a typical choice for pumps, fans, motors, compressors and gearboxes in oil, gas and petrochemical plants.

Technical specifications

Parameter	Specification
Measurement	Absolute vibration, omnidirectional seismic; output proportional to vibration velocity or acceleration
Output and supply	4 to 20 mA current loop, 2-wire; 24 V DC (10 to 35 V DC); maximum load as given in the datasheet load curve
Measuring ranges (ordering code A)	0-10, 0-20, 0-50, 0-100 mm/s RMS; 0-1, 0-5, 0-10 g RMS; 0-25.4 mm/s (1 in/s) RMS; 0-12.7 mm/s (0.5 in/s) RMS; special on request
Dynamic field	Plus or minus 18 g
Frequency response	Linearity plus or minus 2 percent at 75 Hz; plus or minus 3 percent from 10 Hz to 1 kHz; -3 dB from 1 Hz to 2 kHz
Transverse sensitivity	Below 5 percent
Machine connection thread (code B)	1/4-18 NPT L=14 mm (standard); M8 x 1.25; 1/4-28 UNF; M8 x 1; M10 x 1.5; M10 x 1 (L=9 mm)
Certification (code C)	0 standard; 2 ATEX II 2G Ex db IIC T6 Gb and II 2D Ex tb IIIC T85 degC Db; 5 IECEx Ex d IIC T6 Gb and Ex tb IIIC T85 degC Db
Functional safety	SIL 2 certificate to EN/IEC 61508
Case finish (code D)	0 standard not painted; 1 epoxy painted
Materials	AISI 316L stainless steel body; die-cast aluminium explosion-proof case with 3/4 in NPT female cable entry
Operating temperature	-40 to +70 degC
Protection	IP65
Mounting	Any axis; mounting torque 5 to 10 N-m; no maintenance required
Optional accessories	Conduit adapters 3/4 in NPT to M20 (nickel-plated or stainless), 3/4 in NPT to 1/2 in NPT (stainless); plastic or stainless steel tag

Reading the ordering code

The TR-I is ordered as TR-I/A/B/C/D. A selects the measuring range, B the machine connection thread, C the certification and D the case finish. A plant that follows the machinery vibration limits of its standards will choose a velocity range in mm/s RMS, while a high-frequency bearing check may call for an acceleration range in g. Stainless steel threads and the NPT conduit entry make the unit easy to fit to American-style pump and compressor casings, but the thread must be matched to the drilled and tapped mounting boss on the machine.

Using it on classified plant

For hazardous areas order certification code 2 or 5 and confirm that the zone, gas group and temperature class on the nameplate match the plant classification documents. Installation uses certified cable glands or conduit seals in the 3/4 in NPT entry, and the transmitter is bolted rigidly to a clean, flat machine surface so that the reading represents the bearing housing. Related CEMB transmitters include the CEMB TR-27 vibration transmitter and the CEMB TR-PRO high performance vibration transmitter; other equipment is listed under vibration monitoring.

Documents and quotation

The linked document is the CEMB TR-I data sheet. Before ordering, confirm the measuring range, thread, certification code, finish and required conduit adapters, and ask for the safety instructions and certificates that apply to the chosen version. Seven Star LLC, an independent supplier in Muscat, will prepare a quotation from the full ordering code.

Datasheets & Documents

Datasheet CEMB TR-I Data Sheet Download

Reviews (0)

Reviews

There are no reviews yet.

How would you rate this product?

About brand

Balancing is the single subject CEMB has worked on since 1946, from its base in Mandello del Lario, Italy. The company is organized in three divisions, and two of them matter to plant engineers: industrial balancing machines and vibration equipment. Seven Star LLC lists CEMB vibration transmitters, a portable analyzer and balancer, and a horizontal balancing machine, and supplies them to maintenance teams and workshops in Oman as an independent supplier.

CEMB vibration transmitters and balancing equipment

Among the transmitters listed are the TR-26, the TR-27 and the TR-PRO. They are case-mounted sensors that convert absolute machine vibration into a 2-wire 4-20 mA signal for a PLC or DCS. The N600 is a portable instrument for vibration analysis and in-place balancing of rotors, the tool behind searches such as portable balancer Middle East. The Z5-TC is a horizontal dynamic balancing machine.

Where CEMB equipment is used

CEMB vibration transmitters are fitted on fans, blowers, pumps, electric motors, cooling tower gearboxes and similar auxiliary machines where a permanent protection signal is wanted without a full rack system. Portable balancers serve rotating equipment crews in power stations, cement plants and process plants in the GCC. Balancing machines go to motor rewind shops, fan builders and overhaul workshops.

Ordering CEMB parts: what we need

A transmitter code such as TR-26/1/1/2/0 is a configuration string, and every digit selects an option. Send it complete, with the measuring range, the unit (velocity in mm/s, RMS or peak), cable or connector type and length, and the hazardous area marking if the sensor sits in a classified zone. For a balancing machine we need rotor weight range, maximum diameter and length, journal diameters, drive type and the balancing tolerance you work to.

Browse CEMB products by category: Vibration.