High-precision sensing company Michell Instruments’ lightweight humidity verification system for humidity probes saves space as it is designed with portability in mind.
Michell Instruments says the HygroCal100, with a battery life of up to eight hours, weighs 3.2 kg, making it less than 25% of the weight of its closest competitor.
Michell Instruments, represented in South Africa by process control instrumentation systems manufacturer and distributor Instrotech, says the humidity test chamber is stable and allows the evaluation of relative humidity sensors in the range of 5% to 95% relative humidity, and, in addition, up to seven probes, with different diameters and output signals, can be validated simultaneously.
The design of the HygroCal100, which was launched in December, allows the probes to be integrated with the chamber and user interface, enabling the operator to easily monitor the readings of each probe during the calibration cycle. In addition, all the calibration data can be downloaded from the unit onto a USB drive for later use.
An external reference hygrometer, such as Michell’s chilled mirror Optidew Vision, can be integrated into the system. If this reference has a traceable calibration, it allows users to incorporate this traceability into their verifications.
The unit is easily programmable through its touch-screen interface, which enables calibration routines to be completely automated. The operator defines the humidity points and time to remain at each of them. The operator can insert the probes and the reference and then leave the unit to work through the cycle.
The HygroCal100 contains an internal polymer reference, Michell’s latest generation HS3 sensor – resulting in class-leading about 0.8% relative humidity accuracy, says the company.
For long-term reliability, the HygroCal100 can be calibrated against an external reference. This is an automatic function and once the reference is connected and the calibration initiated, the HygroCal100 can automatically run through the steps and prompt the user for actions.
Instrotech was formed in 1981 to create high-quality process control instrumentation and industrial electronics designed to control one or more system parameters, such as temperature, flow rate, weight or position.
The company manufactures and distributes a range of process control instrumentation and specialised systems to the South African and international markets.
Instrotech distributes a range of process control instrumentation, load cells and sensors in South Africa for 13 European and US manufacturers.
Through its manufacturing arm, Calog Instruments, Instrotech manufactures process control instruments and also produces process calibrators, weighing electronics, din-rail mount signal conditioners and digital panel meters.
Instrotech also provides Inspecta FFT, a locally developed and manufactured acoustic tube leak detection system used by power stations for early detection of tube leaks to reduce downtime and prevent consequential damage. The installed base of the Inspecta FFT includes power stations in South Africa, Germany, Australia, Turkey, India, Malaysia and China.