We have become an official distributor of OPTRIS
We now calibrate also current clamps in range 10-950 A AC/DC
Our calibration laboratory extended its scope of accreditation to also include current clamps in AC/DC current ranges from 10 to 950 A.
Please fill request forms for return of equipment
Our website provides request forms for you, our customers, to complete when you need to return equipment for warranty or non-warranty services.
We now calibrate also test equipment for trip time of protection relays
We have become an official distributor of NOVUS
We have become an official distributor of NOVUS - a leading manufacturer of measurement and control equipment for the industry with proven quality and innovative approach.
We no longer distribute equipment of Gossen Metrawatt
Delta Instruments celebrated its 30 years anniversary
We celebrated our anniversary by organizing a 2-day teambuilding event in Bansko for all colleagues and their families. Our teambuilding was full of games, relax and some sports and overall was a great experience for everyone involved.
We received a grant for Overcoming the shortage of funding and the lack of liquidity caused by the epidemic outbreak of COVID-19
Delta Instruments Ltd has been approved and has signed a Contract for a grant № BG16RFOP002-2.073-1369-C01, as part of the project “Overcoming the shortage of funding and the lack of liquidity caused by the epidemic outbreak of COVID-19”, for the amount of 10000 BGN.
How do we work given the COVID-19 situation
In regard to the extraordinary situation in Bulgaria and the world in general because of the Coronavirus COVID-19 pandemic, with this statement we would like to inform you about the current state of our business and the measures we have undertaken to limit any chances of spreading the virus.
Important! We are relocating our office again
From 09/12/2019 we will be in a new office at the following address: ul. 732-ra 20, kv. Boyana, 1616 Sofia, Bulgaria
Visit us at the conference NO Accidents
14 and 15 November 2019 in Grand Hotel Plovdiv. At our info table we will present you our solutions for gas detection, monitoring and others.
Important - we are relocating our office
From 19/09/2016 we will be in a new office at the following address: 8 Malashevska street, block C, BLC “Sofia”, 1202 Sofia, Bulgaria
Our calibration laboratory has resumed its activities with new certificate
Our laboratory for calibration has resumed its activities with a new certificate of accreditation from the BAS.
NEW - RS485 galvanically isolated repeater
This is RS485 repeater and isolator in one device. Both sides are galvanically isolated.
New Transmitter for Temperature and Humidity
DI-RHT1 is designed for measuring and control of the environment in workplaces, storage houses, manufacturing facilities or just for monitoring the ambient temperature and humidity.
New partners Delta instruments - FilesThruTheAir
We are an authorized distributor of FilesThruTheAir for Bulgaria.
a-eberle on the market in Bulgaria
Delta Instruments Ltd. is authorized distributor of А.Eberle GmBH & Co. KG for Bulgaria.
Anti Sleep Alarm
Device preventing falling asleep in important moments
New transmitter GAS-TRANSmitter DGS510-EXP with ATEX certificate
GAS-TRANSmitter DGS510-EXP is purposed as a measuring sensor for gas detectors "GAS ALARM DG510/XX" and "GAS ALARM DG910/XX" series. The transmitter can be used with other gas detectors in strict compliance with its technical specifications. It is designed to detect wide range of explosive gases and vapors. The transmitter is explosion-proof (Ex d) and can be used in zone 1 and 2.
Serial Modbus Master Multiplexer SMM-01
Have you ever had problems to connect several master devices in a Modbus RTU network or just to synchronize RS485 lines with different baud rates ? Serial Master Multiplexer SMM-01 is created particularly for this purpose.
dRTU-3000 - New series of remote I/O modules with Modbus RTU
The remote I/O module type dRTU-3018 operates with 8 discrete inputs type "dry contact" via the Modbus RTU communication protocol over a serial interface RS485.

The module type dRTU-3028 consists of 8 output relays SPDT 5A/250 VAC (5A/30VDC on request).
New Single-Channel Process Indicator series 8001
Purposed for measurement and control of various industrial process parameters. Among its specifications: universal analogue input, 4 programmable SPDT output relays - for High / Low alarm level or ON/OFF control, galvanic isolated current output 4÷20mA, serial communication interface RS485, etc.
New Transmitter for Relative Humidity & Temperature series RHT_RS
For measurement of relative humidity and temperature of air (gas) via an integrated sensor, protected with sintered stainless steel filter for sensitive elements. The measured values are indicated on the display and constantly transmitted through a serial interface RS485 as an output.