About 20 engineers each from Udaipur and Jalore districts had started a relay sit-in at Udyog Bhawan ground here on June 24, said B L Jat, general secretary, Federation of Rajasthan Engineers (FRE).
If the demands are not met, the relay sit-in will continue till July 30 and a mass "chetawani rally" (ultimatum rally) will be organised on July 31 in Jaipur, Jat said.
"Although the sixth pay commission has been adopted in the state, pay scales of engineers from junior to chief engineer is (in the grade of) state teachers and principals," Jat said.
FRE claims to represent over 20,000 engineers from the power, water, PWD, public health, engineering and other departments of the state.